The narrow mountain road that carves a path between Florence and Victor is tied to ghost towns and ghost stories.

This ruined fort and statue are a testament to the last king of Kaua‘i’s savvy diplomacy skills, which briefly brought Russians to Hawai‘i.

A forest of immensely tall and unusually straight oak trees planted nearly 200 years ago to build naval ships that never came to be.

This millennium-old site reflects a time when sugar was a treasured commodity.

This massive subterranean fissure is known as the "underground Grand Canyon."

The only residents of this abandoned housing development full of identical castles are stray cats and dogs.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Why walk on this historical site when you can zoom down instead?

It's unclear what caused the fire that led to this opulent hotel's demise.

Beneath an ancient wishing tree lies an underground chapel with 12th-century frescoes and catacombs dedicated to a lady saint.

A unique rock formation that only a few have managed to venture inside.

Kayak out to a floating restroom.

The birthplace of both the Atomic Age and Godzilla, and the namesake of the bathing suit.

This western-themed amusement park is host to a large number of decaying animatronic cowboys.

This pier made of ice and constructed over the Antarctic winter is used when the resupply cargo ships arrive in summer.

The forgotten remnants of a land-to-sea cable car that was once unique in the world.

A hidden three-foot-wide house separates these two regal churches.

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.

This foolish Victorian sea fort was converted to a deluxe hotel.

A boulder in the Churchyard of Down Cathedral marks the legendary burial place of "The Apostle of Ireland."

The final resting place of the world's first nuclear reactor.

The medieval ferry service has been going strong since the 14th century.

According to a gruesome legend, an architect sacrificed his wife to build this spectacular, 16th-century cathedral.

Mysterious meeting place for UFO hunters near Area 51.