This story appears in the August 2010 issue of National Geographic magazine. We sink into Stargate, sweeping the void with our dive lights. Fifty feet from the surface looms a pale haze, less ...

It had been five hours since my intrepid robot Gilligan left its garage on the front of the submersible Mir 1 and disappeared inside the cavernous shipwreck. Our sub was parked on the upper deck ...

Beneath the land surface of the Bahamas, the underwater caves known as blue holes stretch for hundreds of miles in all directions. Today, these labyrinthine passages host a variety of tiny sea ...

Mysterious Sunken Ship Sunken ships are shrouded in mystery ... for exploring intricate designs and symmetry. Silent Underwater Cave Underwater caves are mysterious and foreboding, offering ...

Archaeological surveys led by scientists at Washington University in St. Louis suggest that coastal and underwater cave sites in southern ... how Odysseus sailed his ship past the mythical sea ...

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 ...

Cave Atlas also says of the conditions that make it a popular spot for diving enthusiasts: "There is very little vegetation surrounding the vents and the bottom is bare sand and limestone.

(This program is no longer available for streaming.) Follow a fearless team of scientists as they venture into blue holes—underwater caves that formed during the last ice age, when sea level ...

The caves once existed above the water line, but were flooded when sea levels rose. Deep within these underwater caves are formations which can only be formed in dry caves - spectacular sculptural ...

When it came to "Thirteen Lives" (2022), shooting in water tanks was much safer than in real underwater caves. But when building the cave sets, the film's production designer had to forgo foam and ...