Many cenotes offer incredible diving opportunitiees. Consider Cenote Zapote to see giant rock formations called "Hells Bells". The Pit is the deepest sinkhole in the Yucatan at 391 feet! Other popular cenotes for diving include Dos Ojos, Maravilla, Angelita and Carwash, which takes on a redish color and is filled with trees, plants, fish and turtles.