The underground river dos ojos is ranked as one of the most beautiful in the world and it has been filmed by the most important professional divers it is the third longest underground river in the world with more than 82 km long on this tour youll visit this cenote and feel the mysticism as you go snorkeling and admire the stalactites and stalagmites considered a place of mayan underworld youll also see some fishes and visit another cave cenote the batcave with walls of speleothems