The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

A tribute to Ponce de Leon's supposed quest for eternal youth.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Town of spiritualists and mediums in Florida.

A bizarre roadside attraction and the first instance of miniature golf in the world.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

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

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

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This spectacular track has run continuously since 1882.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

A beautiful geyser under environmental threat.

A semi-scholarly approach to sex.

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

Elevated freight railway turned wildly successful urban park.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The giant birds honor two native North American species.

This mill on Lake Erie appears to shrink as a viewer approaches thanks to an optical illusion.

The first transatlantic wireless signal was received at this 17th-century fort.

This impressive working clock made of 16,000 plants changes its flowers twice a year.