Saklikoy Beach

Akçakese, Turkki
#135 -sta 148 sisään Istanbulin maakunta

Kuinka päästä

Etsi lentoja tälle rannalle

Noin

Asiantuntija-arvosana 7.5 Oikein hyvä

Saklikoy Beach sijaitsee sijaitsee seuraavassa Meri Mustameri ja sijoittuu 135. sijalle 148 rannan joukossa Istanbulin maakunta. Etäisyys sen pääkaupunkiin - Istanbul on 62 km. Korkein läheinen asutus on Kabakoz, jonka keskus on 2,1 km päässä.

Luonnollinen ympäristö alue luotiin seoksesta vuoristoinen maasto, jyrkät kallioit ja veden turkoosi väri. Tämä hiekkainen ranta laajenee melkein 700 metriä. lempeä syvennys alkaa suoraan rantaviivasta.

Saklikoy Beach tarjoaa laajan valikoiman palveluita: WC, aurinkotuolit, vaatetilojen kaapit, baarit, suihkut. Ranta on valvottu pelastajan toimesta.

Ranta on suosittu erilaisille erilaisille vieraileville kuten: ne jotka arvostavat rauhallista lomaa tai seniorit tai perheet lasten kanssa.

Saklikoy Beach on helppo saavuttaa ja sopii matkailijoille, joilla on lapsia tai ikääntyneitä henkilöitä.

Kuumin kuukausi on elokuu - ilmanlämpötila tänä aikana nousee 28.9°C:een ja vesi lämpenee 21.8°C:een Kylmin kuukausi on tammikuu - ilmanlämpötila laskee 9.9°C:een ja vesi laskee 11.5°C:een.

Sijaitsee asutuksen sisällä
Meriranta, Meri Mustameri
2,1 km kohteeseen Kabakoz (keskusta)
Rantaklubi
Ranta on osittain varattu lomakohteelle, jolla on kaikki infrastruktuuri.
Pääsy polkua pitkin

Sää

history
+27 o C +19 o C
Ilman lämpötila
7.8 M/S
Tuuli
+21 o C
Veden lämpötila
1.5 M
Aaltokorkeus

Kabakoz, Istanbulin maakunta

Kaikki nykyisen alueen rannat

Näkymä

Yleisö

Ruuhkaindeksi (sesonkiaika)
Kohtalainen
Siisteysindeksi
Hyvä

Luonnonpiirteet

Koko ja muoto
Suora rantaviiva
920 m 120 m
Maisema
  • Vuoret
  • Jyrkänteet
Peite
  • Beige hiekka
  • Merenpohja - hiekka
  • Loiva syveneminen

Palvelut

Suihku
WC:t
Pukuhuoneet
Aurinkotuolit ja -varjot
Kahvila / baari
Hengenpelastaja
Uima-allas Beach club

Toiminnot

viator
Tour image

Princes’ Islands Heritage Walking Tour

Ilmainen peruutus

Princes’ Islands Heritage Discovery Walking Tour Discover the timeless charm of the Princes’ Islands on a relaxed and insightful heritage walking tour through Büyükada. This experience is designed for travelers who are interested in history, culture, architecture, and authentic island life, away from crowded tourist routes. For guests who wish to explore further, an optional extension to Heybeliada and the historic Halki Seminary is available. This additional visit is ideal for those interested in religious heritage, education history, and quieter islands, offering a more in-depth understanding of the Princes’ Islands. This historical walking tour is easy-paced, informative, and suitable for all ages, making it the perfect choice for travelers seeking a cultural discovery experience in Istanbul.

alkaen 59,16 $
viator
Tour image
10 Poikkeuksellinen 1 arvostelu

Princes' Island Hidden Coves Scenic Boat Tour (Around the Island)

1 tunti
Ilmainen peruutus

Scenic Princes’ Islands Hidden Coves Boat Tour (Small Boat) is a relaxed, beautiful way to experience Istanbul from the water away from the crowds and close to the islands’ most peaceful coastline. Step onto a cozy small boat and cruise around the Princes’ Islands, where pine covered hills meet elegant waterfront villas, quiet beaches, and historic piers. The highlight of this experience is exploring scenic hidden coves and calm bays that larger boats typically don’t enter. We slow down at the best viewpoints for photos, fresh sea air, and unforgettable island panoramas perfect for couples, friends, and anyone who wants a gentle escape from the city. If the timing is right, you’ll also enjoy warm golden hour light and romantic sunset colors as an added bonus. Routes may vary based on wind and sea conditions, so your captain can always choose the most scenic and comfortable coves on the day.

alkaen 283,95 $
viator
Tour image
10 Poikkeuksellinen 7 arvostelua

Customized Ephesus Tour with Lunch

Ilmainen peruutus

This Ephesus Tour is our best-seller! This tour is a perfect option for those who have a half day to spend around the most important sights of the Ephesus area. This tour is guaranteed Skip-The-Line with pre-purchased tickets. This tour includes pick up and drop service from Izmir, Selçuk, Kusadasi. During your private tour, you will visit; Ephesus Ancient City which used to be the most important commercial center of the western Anatolia, the Temple of Artemision which is known as one of the seven wonders of the Antic World. Also will spend some time. In ceramic house and carpet weaving school.

alkaen 147,89 $
viator
Tour image

Local Food Tasting Tour Visiting 3 Islands from Istanbul

5 tuntia
Ilmainen peruutus

The journey begins on the Asian side of Istanbul. A scenic 40-minute ferry ride takes guests to a charming island, offering beautiful sea views along the way and insights into local island life. Each island has its own distinct style, atmosphere, and cuisine. This experience offers a deeper look into local life and how people live beyond the city’s main tourist hotspots. While walking through the island’s charming streets, guests explore the diverse flavors of Turkish cuisine and discover local food spots that reflect everyday island culture. Beyond tasting local food, the experience provides cultural context and a local perspective on Istanbul’s history and modern life through the unique setting of the Princes’ Islands. Other Things to Note Food is not included in the tour price, allowing guests to choose what they eat and how much they spend. Most places accept cards; however, some small street vendors only accept cash, so bringing a small amount of Turkish lira is recommended.

alkaen 141,97 $
viator
Tour image

Romantic Island Escape at Sunset ( Princes' Islands Istanbul )

6 tuntia
Ilmainen peruutus

A pleasant journey to Dilburnu Nature Park, Yücetepe Hill, and the Big Tour Route—some of Büyükada’s most scenic natural areas—where the experience begins as the sun slowly sets over the sea. This peaceful escape offers the ideal setting to enjoy the start of sunset, surrounded by lush nature and panoramic island views. Designed for travelers seeking a calm and romantic island moment, the experience highlights the beauty of Büyükada during golden hour. As daylight gently fades, guests can relax, take photos, and fully enjoy the tranquil atmosphere of the Princes’ Islands. The setting brings together nature, sea views, and the soft colors of sunset, creating a truly memorable island experience. This sunset journey through the islands is ideal for couples, photographers, and anyone wishing to experience the quieter, more atmospheric side of the Princes’ Islands.

alkaen 150,00 $
viator
Tour image
10 Poikkeuksellinen 1 arvostelu

Hidden Beach Escape Princes Islands Swim Tour

Ilmainen peruutus

This tour is a relaxed sea escape designed for guests who want to swim, unwind, and discover hidden beaches around the Princes’ Islands, away from the busy public areas. During the tour, you will travel to secluded coastal spots and quiet beaches known for their clear waters and peaceful atmosphere. These locations are chosen for their natural beauty and are often missed by regular visitors. You will have plenty of time to swim in the sea, sunbathe, and enjoy the island surroundings at an easy, unhurried pace. The experience is not about rushing from place to place. Instead, it focuses on enjoying the sea, nature, and island lifestyle. There will be stops for swimming, relaxing, taking photos, and simply enjoying the moment. Your host will share light local insights about the islands and help guide you to the best swimming spots. In short, this tour is about escaping the city, swimming in hidden beaches, and enjoying the Princes’ Islands like a local.

alkaen 70,99 $
viator
Tour image
8 Oikein hyvä 1 arvostelu

Half Day Princes' Islands Tour

Ilmainen peruutus

Our journey begins with a 1.5-hour scenic ferry ride, offering stunning views of Istanbul’s skyline while you enjoy tea and simit, just like the locals. Once on the island, you’ll explore its peaceful car-free streets, historic wooden mansions, and charming hidden corners. Your local guide will share stories from the island’s rich multicultural past, and you’ll get to see all the major highlights — from lush nature parks to the historic Aya Yorgi Church perched on top of the island. You’ll also enjoy a cup of Turkish coffee or tea — and if you're up for it, we can read your coffee fortune for a fun local touch! Want to explore more on your own? Bikes are available to rent on the island.

alkaen 94,65 $
viator
Tour image

2 Day Private Cappadocia Tour From Istanbul With Domestic Flight

48 tuntia
Yksityiskierros

Enjoy a 2-day 1-night tour to Cappadocia from Istanbul. Experience a unique Cave Hotel at Cappadocia, and our professional tour guides will take you to see some amazing sights that will make your tour unforgettable.

alkaen 900,00 $
viator
Tour image
10 Poikkeuksellinen 2 arvostelua

Private Tour of Istanbul with Famous Grand Bazaar

8 tuntia
Ilmainen peruutus

Discover the spectacular Old City of Istanbul...The best tour for discovering Istanbul city by an expert guide. You will see the main sights including the Blue Mosque, Hippodrome, Aya Sofya Mosque, Topkapi Palace, and Grand Bazaar

alkaen 110,00 $
viator
Tour image

Beyond Istanbul Princes' Islands Full Day Tour with lunch

Ilmainen peruutus

Skip the mainland chaos and experience the two best-kept secrets of the Sea of Marmara. This curated tour pairs the casual beach-town energy of Kınalıada with the grand, aristocratic elegance of Büyükada (Princes' Islands). Two distinct islands. One seamless day trip.

alkaen 41,41 $
viator
Tour image
9.8 Poikkeuksellinen 9 arvostelua

Istanbul Princes' Islands Cycling Tour

4 tuntia
Ilmainen peruutus

Pedal through the peaceful streets of Büyükada, the largest and greenest of the Princes’ Islands, on a scenic cycling tour made for all levels. Cruise effortlessly along the island’s car-free lanes with simple gears, surrounded by pine trees, sea views, and old mansions. The gentle hills and flat stretches make it perfect for both casual riders and curious explorers. Along the way, we’ll stop for Turkish tea, coffee, and local snacks under the shade of trees. You’ll discover landmarks like the Aya Yorgi Church & Monastery perched on a hilltop with panoramic views, the elegant Hamidiye Mosque, and the iconic wooden mansions that give Büyükada its charm. We’ll also pass by the former Greek Orphanage, one of the largest wooden buildings in Europe, and pause at peaceful viewpoints that overlook the Sea of Marmara and nearby islands. This tour is a beautiful mix of light adventure, nature, and local history — all in one unforgettable ride through the soul of Büyükada.

alkaen 45,00 $
viator
Tour image
9.7 Poikkeuksellinen 501 arvostelua

Istanbul Airport Private VIP Transfers Hotels and Cruise Port

Ilmainen peruutus

Travel with peace of mind with our comfortable and safe transfer vehicles from Istanbul Airport to your accommodation or from your accommodation to Istanbul Airport. With our reliable transfers, you will avoid local taxi drivers. Benefit from a reliable and hassle-free ground transportation provider and receive a professional team to meet and greet you upon your arrival at Istanbul Airport. Sit back and relax in a vehicle that is private to you and your group. Easily get to your hotel, apartment or private residence. Take advantage of flight tracking to avoid unnecessary waiting fees and ensure that your driver is ready on time. We offer 24/7 service to suit your needs, regardless of the arrival or departure time of your flight. We know how to serve.

alkaen 35,54 $
viator
Tour image
9.8 Poikkeuksellinen 626 arvostelua

Princess Island (Büyükada)Tour with Lunch and Island Shuttle Car

9 tuntia
Ilmainen peruutus

Many travel agencies in Istanbul offer island tours, but we are truly different! Most tours claim to visit 2 or 3 islands just to make the itinerary look attractive, but these extra stops are a waste of time and leave guests feeling like they’ve just taken a long boat ride without guide and nothing special to do. The only island truly worth visiting is Büyükada, and that’s exactly where we focus. With us, you won’t waste time on unnecessary stops—instead, you’ll enjoy real time on the island, exploring its beauty and atmosphere the right way. Büyükada is the crown jewel of the Princes’ Islands, famous for its peaceful car-free streets, historic Ottoman mansions, pine-covered hills, and stunning sea views. While many travelers who take standard tours come back saying there’s nothing to do on the islands, our guests say the opposite—because we take the experience one step further with an ısland shuttle vehicle tour that brings the island’s history, culture, and hidden corners to life.

alkaen 22,51 $
viator
Tour image
9.9 Poikkeuksellinen 985 arvostelua

Istanbul Luxury Bosphorus Yacht Cruise with Asian Side Stop

2 tuntia
Ilmainen peruutus

Experience the Bosphorus in style on a scenic cruise between Europe and Asia, guided by a knowledgeable multilingual expert. Discover Istanbul from a unique vantage point as you sail along one of the world’s most iconic waterways. This is a small-group cruise on a luxury yacht, offering a calm, spacious, and premium alternative to crowded boats. Enjoy a stop on the Asian side in Beylerbeyi, where you can wander through a charming seaside neighborhood and experience authentic local life. Along the route, admire famous landmarks such as Topkapi Palace, Blue Mosque, and Maiden’s Tower, as well as the vibrant districts of Ortakoy and Bebek. Pass under the impressive Bosphorus bridges and see the historic Rumeli Fortress. During the 2.5-hour cruise, relax, take in the views, and enjoy engaging commentary—an unforgettable way to explore Istanbul.

alkaen 33,17 $
viator
Tour image
10 Poikkeuksellinen 1537 arvostelua

Full-Day Private Tour of Cappadocia's Highlights (Car&Guide )

8 tuntia
Ilmainen peruutus

The most important thing about Private Tours is that gives you %100 flexibility about the tour that you will make. You can decide where to go or where not to . Also you will be the one who will decide about the timing. You can check the information about the places to visit in Cappadocia and you can make your own tour program and you can see most highlighted places in a day . Also you will be able to choose the language for the Professional Licensed Tour Guide.

alkaen 211,65 $
viator
Tour image
9.6 Poikkeuksellinen 1512 arvostelua

Istanbul E-pass: Top Istanbul Attractions with Skip The Ticket Line

Ilmainen peruutus

Istanbul E-pass is a fully digital sightseeing pass that covers over 100 top Istanbul Attractions. Choose your E-pass 1,2,3,5 or 7 days and enjoy the contactless entry with your mobile pass without paying at the gate of attractions. Istanbul E-pass offers attractions in 3 different ways; - Walk-in Attractions: Show E-pass ID and get in. - Guided Tours: Meet with guide at the meeting point to join the tour. - Reservation Required Tours: Make your reservation via the E-pass panel then get a confirmation email. Why Travelers Choose Istanbul E-pass? -Get a complimentary one-way private airport transfer with your Istanbul E-pass. - Customer support line is available to assist via WhatsApp and chat lines during visits or planning visits. - Istanbul E-pass is available instantly to use after purchase with access to 100+ Top Istanbul attractions. - Listen to the history of museums with professional tour guides. - Enjoy the skip-the-ticket-line at most of the attractions.

alkaen 148,06 $
viator
Tour image
9.6 Poikkeuksellinen 278 arvostelua

Small-Group Topkapi Palace and Harem Tour with Tickets

3 tuntia
Ilmainen peruutus

This small-group experience goes beyond a standard palace visit by offering context, access, and storytelling. With priority admission and an expert local guide, you’ll explore Topkapi Palace as the Ottomans once experienced it: understanding how power, ceremony, and daily life shaped the empire. The tour includes the Harem, an essential yet often excluded part of the palace, revealing the private world of the sultans alongside the public spaces of rule. You’ll also visit the Holy Relics, Imperial Kitchens, Royal Court, and terraced gardens, pausing to enjoy panoramic views over the Bosphorus. Designed for small groups, the experience concludes with practical guidance on what to explore next in Istanbul, starting from a central meeting point in Sultanahmet or Galata Port.

alkaen 55,67 $
viator
Tour image
9.7 Poikkeuksellinen 90 arvostelua

Small Group Full-Day Istanbul Old City Tour with Lunch & Tickets

7 tuntia
Ilmainen peruutus

Discover Istanbul's rich Culture and history with our experienced guides. Skip the Museum Ticket Queues with your guide. Visit Hagia Sophia, Blue Mosque, Hippodrome, Brief Handicraft Presentation next to Grand Bazaar (Optional, guest may opt to explore the bazaar on their own) and Topkapı Palace. Lunch included. Why You Should Choose This Tour ✔ Door-to-door service with hotel pick-up and drop-off (Centrally located hotels on the European side; pick-up begins up to 1 hour before tour start) ✔ All entrance tickets included — no separate payments on the day ✔ Lunch included — no need to plan or budget extra ✔ Small-group experience for a more personal and relaxed tour Enjoy Istanbul without worrying about tickets, transport, or unexpected costs.

alkaen 165,83 $

Majoituksia lähellä

Loading stays...

Sijainti

Tämä ranta

100–300 m pysäköinnistä
Pysäköinti
Pysäköinti noin 300 m päässä

Paikkakunnat

Kabakoz  •  2,1 km
Istanbul  •  62,2 km

Kuljetus

KCO  •  33,8 km
Şile Terminal  •  5,6 km
Tisan Mekanik  •  38,3 km

Läheiset rannat

Kabakoz Koyu Plaji
2,5 km
Kabakoz Koyu Plaji
8.2 Oikein hyvä
Uzunkum Plaji
3,6 km
Uzunkum Plaji
8 Oikein hyvä
Sile Ala Kadinlar Plaji
4,2 km
Sile Ala Kadinlar Plaji
8 Oikein hyvä
Kaikki lähimmät rannat
100–300 m pysäköinnistä
Pysäköinti
Pysäköinti noin 300 m päässä

Paikkakunnat

Kabakoz  •  2,1 km
Istanbul  •  62,2 km

Kuljetus

KCO  •  33,8 km
Şile Terminal  •  5,6 km
Tisan Mekanik  •  38,3 km
Kabakoz Koyu Plaji
2,5 km
Kabakoz Koyu Plaji
8.2 Oikein hyvä
Uzunkum Plaji
3,6 km
Uzunkum Plaji
8 Oikein hyvä
Sile Ala Kadinlar Plaji
4,2 km
Sile Ala Kadinlar Plaji
8 Oikein hyvä
Kaikki lähimmät rannat

Matkustajat arvostelut

Matkustajat arvostelut

Jaa kokemuksesi muiden matkailijoiden kanssa

Muhammed Baş
Vasta-alkaja rannakävijä Kesäkuu 2025
2 Erittäin huono

Ajoneuvomaksu on 500 liiraa. Aurinkotuolin maksu on 500. Tiet ovat erittäin huonossa kunnossa, jos sinulla ei ole 4x4-autoa, älä mene. Kartta antaa monia vääriä suuntia, eivätkä he edes laittaneet opasteita tielle, oli vaikeaa löytää sisäänkäynti. Meri on täysin peitetty merilevällä ja meduusoilla. Kukaan ei ole paikalla puuttumaan meduusan pistoon. Meri on aallokkoista, eikä pelastajaa ole.

Käännetty Näytä alkuperäinen Näytä käännös
Vehicle entrance fee is 500 liras. Sunbed fee is 500. The roads are very bad, if you do not have a 4x4 car, do not go. The map gives many wrong directions, they did not even put a sign on the road, it was difficult to find the entrance. The sea is completely covered with seaweed and jellyfish. There is no one to intervene in case of a jellyfish sting. The sea is wavy, there is no lifeguard.
Ajoneuvomaksu on 500 liiraa. Aurinkotuolin maksu on 500. Tiet ovat erittäin huonossa kunnossa, jos sinulla ei ole 4x4-autoa, älä mene. Kartta antaa monia vääriä suuntia, eivätkä he edes laittaneet opasteita tielle, oli vaikeaa löytää sisäänkäynti. Meri on täysin peitetty merilevällä ja meduusoilla. Kukaan ei ole paikalla puuttumaan meduusan pistoon. Meri on aallokkoista, eikä pelastajaa ole.
0
Reply
Raportti
Izafe Muradlı
Vasta-alkaja rannakävijä Kesäkuu 2025
10 Poikkeuksellinen

Yhdellä sanalla huonoo. Tulimme perheenä ja vastaanotto oli erittäin hyvä, se oli todella mukavaa, se on perheyritys, suosittelen sitä lämpimästi, ehdottomasti kannattaa poiketa täälläkin.

Käännetty Näytä alkuperäinen Näytä käännös
in one word ba-y-y-dimmm. We came as a family and our welcome was very good, it was very nice, it is a family business, I highly recommend it, definitely stop by here too
Yhdellä sanalla huonoo. Tulimme perheenä ja vastaanotto oli erittäin hyvä, se oli todella mukavaa, se on perheyritys, suosittelen sitä lämpimästi, ehdottomasti kannattaa poiketa täälläkin.
0
Reply
Raportti
namor a
Vasta-alkaja rannakävijä Helmikuu 2025
2 Erittäin huono

En ymmärrä, miten kunta sallii tällaisen asian. Se on erittäin kallista... Jokainen paikka, joka pitäisi olla ilmainen, maksaa rahaa ja on erittäin kallis. Tuntuu tyhmältä mennä sinne rauhoittumaan.

Käännetty Näytä alkuperäinen Näytä käännös
I don't understand how the municipality allows such a thing. It's very expensive... Every place that should be free costs money and is very expensive. One feels like a fool by going there for peace.
En ymmärrä, miten kunta sallii tällaisen asian. Se on erittäin kallista... Jokainen paikka, joka pitäisi olla ilmainen, maksaa rahaa ja on erittäin kallis. Tuntuu tyhmältä mennä sinne rauhoittumaan.
0
Reply
Raportti
neşe dogru
Vasta-alkaja rannakävijä Kesäkuu 2024
2 Erittäin huono

Meren sisäänkäynti on erittäin huono. Siellä on isoja kiviä. Sisään pääseminen on vaivalloista ja ulos lähteminen on eri asia. Näköala on kaunis. Mutta hinnat ovat hullut. 1000 liiraa maksetaan uimisesta meressä. Aurinkotuolien, pöytien jne. käyttö maksaa erikseen. Tie on erittäin huono. Maalaistie. Yksi olut maksaa 195 liiraa. Onko se sen arvoista vai ei. Jos tavoitteesi on paeta, niin tämä on rauhallinen paikka. Emme olleet tyytyväisiä.

Käännetty Näytä alkuperäinen Näytä käännös
The entrance to the sea is very bad. There are big big stones. Getting in is a hassle and leaving is a different matter. The view is beautiful. But the prices are crazy. 1000 lira is paid to swim in the sea. Use of sun loungers, tables etc. The road is very bad. Dirt road. One beer is 195 lira. Whether it does or not. If your goal is to get away, then a secluded place. We were not satisfied.
Meren sisäänkäynti on erittäin huono. Siellä on isoja kiviä. Sisään pääseminen on vaivalloista ja ulos lähteminen on eri asia. Näköala on kaunis. Mutta hinnat ovat hullut. 1000 liiraa maksetaan uimisesta meressä. Aurinkotuolien, pöytien jne. käyttö maksaa erikseen. Tie on erittäin huono. Maalaistie. Yksi olut maksaa 195 liiraa. Onko se sen arvoista vai ei. Jos tavoitteesi on paeta, niin tämä on rauhallinen paikka. Emme olleet tyytyväisiä.
0
Reply
Raportti
Hasem Gulhan
Vasta-alkaja rannakävijä Huhtikuu 2024
10 Poikkeuksellinen

Pidin siitä todella paljon, olin siellä 3 päivää, laatu on täydellinen verrattuna menneisyyteen, hinnat ovat kohtuulliset, se on erittäin söpö lahti ja meri on erittäin puhdas, olin tyytyväinen palveluun ja liiketoimintojen ihmiset olivat erittäin ystävällisiä ja herrasmiehiä, tämä on nyt kesälomakohteeni.

Käännetty Näytä alkuperäinen Näytä käännös
I liked it very much, I stayed for 3 days, the quality is perfect compared to the past, the prices are affordable, it is a very sweet bay and the sea is very clean, I was satisfied with the service and the people in the businesses were very friendly and gentlemanly, this is my holiday destination in the summer from now on.
Pidin siitä todella paljon, olin siellä 3 päivää, laatu on täydellinen verrattuna menneisyyteen, hinnat ovat kohtuulliset, se on erittäin söpö lahti ja meri on erittäin puhdas, olin tyytyväinen palveluun ja liiketoimintojen ihmiset olivat erittäin ystävällisiä ja herrasmiehiä, tämä on nyt kesälomakohteeni.
0
Reply
Raportti
Katso vielä 20 arvostelua Googlessa