A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

An Arizona museum with a collection of pharmaceutical oddities, including a jar of a gangster's chewed gum.

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

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

What is the Thing?

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

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

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

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

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

This grand gothic brewery has been pumping out suds for over a hundred years.

The famous greeting card maker owns a collection of paintings by the famed surrealist.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

A small car graveyard sits in the shadow of the famous Cadillac Ranch.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

This is one really big nut.

A clear blue swimming hole with hidden caves, still unexplored.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

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

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

A mysterious spirit totem at the edge of Navajo lands.