This is the entrance to the cenote or sinkhole located on the Caribbean coast of the state Quintana Roo, Mexico.
"Dos Ojos" for the language enthusiasts, is Spanish for two eyes. It refers to two neighbouring cenotes or sinkholes which are connected by a shared and very large cavern zone.
There are opportunities for those looking for adventures of any age, with snorkeling in shallower areas and cave diving in deeper areas available.