Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

A mysterious "wedding cake" castle in the middle of the urban desert.

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

Collection of vintage trailers double as hotel rooms.

The world's largest military aircraft cemetery.

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

Limestone caves with spectacular showcase chambers.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

Ancient pueblos built into the base of a natural canyon wall.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

This historic national park is covered in the stunning ruins of red rock pueblos.

The Magical World of George Phar Legler.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

America's only nuclear missile silo open to the public.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

A reproduction of earth's many biomes.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A self-built castle made by a mysterious man.

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

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

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