In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Odd outsider art installations surround a Gold Rush-era ghost town.

The ruins of Theodore Roosevelt's beloved ranch stand in a forgotten corner of a national park named after him.

The world's largest Holstein cow.

This Arkansas town is known for its gangster history, its healing waters, and now its brews.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

Tucked away between two 19th-century buildings, this small shop specializes in the macabre.

This mausoleum is the final resting place of one of St. Louis's richest and most tragic families.

During the 19th-century, this park was a vital trading fort.

This wooded grove of beautiful hand-built stone grottos is a hidden gem within a shuttered Franciscan monastery.

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

Community bookshelf of 25-foot-tall book spines.

Curious cave that stays a cool 56 degrees all year long.

European castle ruins in an American state park are actually the product of death and grief.

Less a museum than a bizarre fantasy world created by artists and engineers.

Millions of dollars worth of sculpture decorate this Iowa city center.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

Over 50 historic windmills whir away at this outdoor museum.

These massive mitts are made of 30 tons of devotional bronze.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

Once an ancient sea, this landscape of rocky ravines is filled with the fossils of ancient marine life.

A statue high in a hill that represents how Buffalo Bill got his name.