Well, this is in Riviera Maya, we took a ferry ride from the island of Cozumel to Playa del Carmen (mainland) and a van to here, where the Rio Secreto (Secret River) is.

Had the description been more detailed, we may not have taken this excursion. When we got together with our group which consisted of just the four of us. The other couple was two newly weds of twenty-something. That should have told us something about the adventure we were about to have. The guy with the red hat is the guide.