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

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

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

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

At the base of the Spring Mountains, a unique nursery packed with desert plants.

The fifth-longest natural arch in the world, and the longest outside China.

A little-known hot spring haven right below the highway.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

A giant open-air sculpture made of over 200 full-sized boats.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A collection of witchcraft artifacts and occult paraphernalia started by the leader of the Long Island Coven.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

Home of an evil witch famous within southern folklore.

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Despite the name, this narrow bridge isn't very dangerous at all.

An abandoned Victorian-era mill in the middle of modern Manchester.

Even Henry David Thoreau found this glacial pothole irresistible.

The largest body of water in Massachusetts annihilated four small towns just to slake Boston's thirst.