Explore the depths of Devils Hole, an underwater cave nestled in the vast desert of Death Valley National Park. Aside from its peculiar location, this complex cave system is home to the rarest fish in the world, the Devils Hole Pupfish. Get ready to dive a world unlike any other.

Its said that whatever exits the well, can never return. Go on an underwater journey to Montezuma Well, home to the origin story of Southwest Native American tribes - and a bizarre mystery that continues to baffle researchers to this day.

December 7th, 1941 - a day that altered human history. Relive the attack on Pearl Harbor through survivor interviews, archive footage and new underwater imagery of the USS Arizona, one of the US Navy battleships which sank during the aerial attack on the Hawaiian port.

The USS Arizona is more than a memorial to America's past - it is a scientific treasure with immense value. Learn about the new methods and an ROV being developed to map and explore this underwater wonder.

In 1948, a top secret aircraft project known as "Sun Tracker" crashed into the vast desert waters of Lake Mead. After decades of searching, the B-29 Super-fortress airplane wreck is now open for diving.

Yellowstone, the world's first National Park, is known for its beautiful forests, wildlife, and waterfalls - but beneath its water's surface, there lies a complex environment. From deep geothermal smokers, to marine life, the crown jewel of the Park Service is an underwater wonder in itself.