The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

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."

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Dramatic river bend surrounds a natural red-rocked pedestal.

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

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

The fifth-longest natural arch in the world, and the longest outside China.

The remains of this early 20th century refinery loom on a mountainside like a graffiti-covered fortress.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Curiously, this large sporting goods store features 14 wax representations of American presidents.

There's nothing creepier than a cemetery next to a clown motel.

The drama of nature in full effect in this Nevada State Park.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

This natural marble cave is one of only five national monuments in Oregon.

A vertically floating hemlock controls the waves and weather at Crater Lake.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.