The world’s highest ski resort was deserted after an 18,000-year-old glacier melted away.

The real-life site of Ichabod Crane's infamous gourd attack.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

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

This house was the subject of an Edward Hopper painting, which in turn helped inspire the design of the Bates house in Alfred Hitchcock's 'Psycho.'

The longest navigable underground river in the United States is home to countless blind and albino animals.

Mysterious meeting place for UFO hunters near Area 51.

These strange carved boulders in a forested canyon resemble tiny stone villages.

Once a farming community founded by the Italian survivors of an immigration scam, this colony is now a free camp and roadside attraction.

America's oldest Italian restaurant is a San Francisco institution.

At this 1940s-era neighborhood favorite, you can still drink a cherry phosphate.

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

This centuries-old Italian chapel hangs midway down a sheer cliffside.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

Recorded as the first person buried in Arlington Cemetery.

Part of a highway network meant to connect Miami to Montreal, this 10-mile stretch of road made from red bricks is still around 100 years later.

An abandoned observatory in the middle of the Illinois prairie.

A former Canadian Pacific Railway station turned liquor store, the first and only station in Canada visited by British royalty.

There’s a hidden military meme engraved on the World War II Memorial.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

A unique museum where guests can rent and operate a locomotive.

Home to a full-scale replica of the Ezekiel Airship, an aircraft that allegedly flew in 1902—a year before the Wright brothers took to the skies over Kitty Hawk.

Accessible only by boat, this centuries-old island fort never saw troops or combat.