Read a National Geographic magazine article about Krubera Cave and get information, facts, and more about cave exploration.

The world's deepest underwater sinkhole in the waters of Chetumal Bay between Mexico and Belize remains shrouded in mystery after researchers reported they have yet to determine its full depth.

Rivers create landforms, foster biodiversity, and provide sustenance to humanity; however, little attention is paid to their depth. The world's deepest rivers showcase the other face of these mighty ...

Add Yahoo as a preferred source to see more of our stories on Google. Researchers drilled 8,000 feet into South Pole ice to install two seismometers. On the surface, Antarctica's vast ice sheet ...

Norway’s Rogfast is an exceptional engineering feat, opening a route for drivers deep below the North Sea. We went down to see it.