The highest point in Washington state is a volcano covered in glaciers.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

A plaque commemorates the spot in the Oregon woods where the first-ever Geocache was hidden.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

A small car graveyard sits in the shadow of the famous Cadillac Ranch.

These half-buried combine harvesters just off Route 66 are an homage to the Cadillac Ranch.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.

The Grand Canyon of Texas.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

The grandson of a Kiowa chief created what has become the iconic symbol of a city on the Plains.

The United States's largest hand-dug well is topped with a state-of-the-art museum.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.

Cannon designed to fire an atomic warhead.

A house turned museum is the real-life "home" of the fictional main character of The Wizard of Oz.

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

Self-built house and sculpture park where the creator can still be seen in a glass coffin.

A wonderful collection of all things Oz is nestled in the heart of Kansas.

A unique attraction and museum dedicated to exploring iconic roadside structures.

The once highest point in China blends symbolic design with a kick of adrenaline.

The most famous location in China was home to whole dynasties worth of imperial rulers.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

The largest known Ancient Egyptian obelisk.

Ancient Egyptian relief, claimed to depict an electrical light.

An alien landscape of chalk-rock in the Egyptian desert.