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.

Sloth rehabilitation center in the jungle of Costa Rica.

Once disputed as the largest sundial in the world.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

Stairs often replace streets on the steep slopes of this old mining town.

This Old West hotel, the longest in continuous operation in the state of Arizona, is claimed to be haunted.

A giant mascot, a car bomb, and the mafia mingle in the history of a defunct restaurant chain.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

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

An urban laboratory.

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

A Wild West jailhouse that slid down the mountainside.

Inside this store, a mysterious statue draws visitors from the world over.

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

The highest bridge in America was built for an almost unnervingly small amount of money.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

Dramatic river bend surrounds a natural red-rocked pedestal.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A tunnel with windows, so you don't miss out on the impressive views.