Cueva de los peces
Underwater treasures can be seen at the Cueva de los Peces (a natural pool) , a flooded tectonic fault (or cenote), about 70m deep on the inland side of the road, almost exactly midway between Playa Larga and Playa Girón. There are lots of bright, tropical fish, plus you can explore back into the darker, spookier parts of the cenote ideal for snorkelling and is teeming with fish. The shallow water here is perfect for snorkeling. Very nice place to stay half day there.