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

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

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The first declared National Monument in the United States.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

What was once the largest NFL stadium.

Strange physical sensations and optical contradictions keep visitors coming back for more.

This solemn facility remembers the cruel effort to compel Native American children to relinquish their culture.

"The Most Boring Road in the State."

One of the largest crucifixes in the world stands 55 feet tall in a secluded, wooded area of northern Michigan.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

World's largest Christmas store.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

This freshwater spring fills with 10,000 gallons of water per minute.

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

A Wild West jailhouse that slid down the mountainside.

A spiritual vortex among the red rocks in Sedona.

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

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

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

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