The Canary Islands not only boast the third largest volcano in the world, but also the largest natural underwater lava tunnel ... and a blend of dry and submerged cave sections.

A group of divers have connected two underwater caverns in eastern Mexico to reveal what is believed to be the biggest flooded cave on the planet, a discovery that could help shed new light on the ...

Is this really a dire wolf? Is this really a dire wolf? Maya Artifacts Found In World's Largest Underwater Cave Maya Artifacts Found In World's Largest Underwater Cave Maya Artifacts Found In ...