Explorers as a part of the Great Maya Aquifer Project discovered a connection between two large underwater caverns on the Yucatan Peninsula. When combined, the two systems formed a 215-mile-long ...

In a flooded cave system in the Mexican state of Quintana Roo on the Yucatán peninsula, a manatee mother swims up to cave diver Klaus Thymann, who captured stunning footage and images of these ...