Underwater Wonders of the National Parks

Exploring Devils Hole, an underwater cave in Nevada where the rarest fish in the world lives.

A journey to Arizona's Montezuma Well, home to the origin story of Southwest Native American tribes.

The battleship USS Arizona Memorial in Hawaii's Pearl Harbor is a scientific treasure.

Reliving the Japanese attack on Pearl Harbor and the sinking of the battleship USS Arizona.

Buck Island is home to some of the most spectacular coral reefs in the Caribbean.

A secret aircraft project that crashed into the waters of Lake Mead in 1948 is now open for diving.

Exploring Yellowstone's underwater wonders from geothermal smokers to marine life.