One believer transformed a local curiosity into proof of Vikings on the Great Plains.

What is the Thing?

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

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.

Rippling sand dunes frozen in the Arizona rock.

Where Cusack's record store from the film "High Fidelity" was located.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

A blacklight journey through a celestial art exhibit.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A museum dedicated to the alleged Roswell Incident.

A famous flea market artist's studio that's full of odds and ends.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

An abandoned amusement park based on the popular 1940s Red Ryder comic strip.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

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

The Grand Canyon of Texas.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.