Although it is about 30 km away from Celestún, my experience is that you don't necessarily need a 4x4 to reach this beach. I managed to get there without any issues. However, the road is quite narrow and there are branches that may scratch your car, so you can't drive too fast. I wouldn't recommend going if it has rained recently because the wetlands can become flooded and impassable. In fact, we saw a 4x4 vehicle getting stuck on this trip, probably because they took a risky route through a deep puddle. If you do decide to go, you'll end up at the lighthouse, where you'll find a pristine beach and a breathtaking view of both the lighthouse and the Celestún-style beach.