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

This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

One of Los Angeles's first murals once vibrantly depicted the dangers of United States imperialism.

Authentic gondola hanging from the ceiling, notable mural in the back room.

The largest collection of two headed animals in the world.

60 feet of towering steel balances gracefully.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

The words of the neighborhood's most famous poets adorn four concrete walls.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

A natural history wunderkammer in the middle of the desert.

Once a year, at exactly 11:11 a.m., this monument comes to life.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

Northern Ireland's Brobdingnagian stepping stones.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

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

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

A Wild West jailhouse that slid down the mountainside.

The oldest attraction in Disneyland is a prehistoric stump that Walt may have bought for his wife.

Oldest building in California still in use.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.