On a liveaboard trip, you're bound to run into a whole cast of characters. Take enough of these trips, and some of their ...

Last Wednesday, after ten months of work, the Underwater Exploration Group of the Great Maya Aquifer Project (GAM) found a connection between two of the most extensive flooded cavern systems on ...

National Geographic produced this content as part of our partnership with Rolex, formed to promote exploration and conservation. The organizations will join forces in efforts that support veteran ...