See massive fossils that are over 200 million years old in northeastern Arizona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A reproduction of earth's many biomes.

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

The world’s largest underground marble quarry is hiding in Vermont.

A classic roadside attraction on Vermont's historic Route 5.

A tomb with a window to ensure the interred wasn't buried alive.

These mysterious petroglyphs in Vermont reflect a troubled history in the treatment of Native American culture.

The quaint little Vermont town played a quaint little Connecticut town in Tim Burton's "Beetlejuice."

On a small Puerto Rican island, banks of secret naval bunkers lie abandoned and filled with piles of office equipment.

The bat-covered home of one of the world's most popular brands of rum is located on a tropical Art Deco campus.

The world's brightest bioluminescent bay.

The world's second largest single-dish radio telescope, once used to contact E.T.

This small primate research island is teeming with playing, fighting wild monkeys.

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

The decaying remains of a ship whose captain mysteriously disappeared.

An enormous, 30-story-deep hole in the middle of Guatemala City.

This dramatic sea spire is home to the world's rarest insect and is part of the lost continent of Zealandia.

Nature is leading a successful mutiny on this century-old freighter.

This unusual rock formation looks like an apple that has been neatly sliced in half.

Six times a day a train runs right through the middle of this Thai street market, sending vendors scrambling.

On stormy days debris from this unfinished and abandoned skyscraper rains down on the Bangkok streets.