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

New Orleans' famous cemetery, located on the site of a former race track.

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

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

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

A mysterious castle built as a monument to lost love.

Mysterious 500-year-old tapestries depict a unicorn hunt.

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

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

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

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A beautiful geyser under environmental threat.

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

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The first declared National Monument in the United States.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

World's first "penitentiary," meant to be humane, drove men insane.

The final resting place of New Orleans' most famous voodoo priestess.