The sunken structure looks like the victim of a catastrophic flood.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This 21st century cabinet of curiosities includes dinosaur bones, moon rocks, film memorabilia, and more.

Despite the ever pressing encroachment of urban sprawl this grand New Orleans manse still stands.

A house carved into a rock in the 1940s.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

An extensive collection of fine art devoted to man's best friend.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

A handful of beehive kilns are all that’s left of a historic brick-making empire.

Spend the night in this formerly abandoned traditional Scottish village.

This popular pitstop lives up to its name.

This influential Renaissance-era library was once the haunt of kings and monks.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

An abandoned swimming pool decays on the outskirts of Berlin.

A late-night restaurant empire was launched from this humble storefront.

Every equinox this Maya pyramid puts on a spooky ancient light show.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

This historic stone bridge has an entire neighborhood clinging to its sides.

The steepest classic funicular in the world glides along a dizzying incline.

This golf ball–shaped former desert real estate office now houses a UFO museum.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

The world's largest collection of fine-scale miniatures and one the nation's largest collections of antique toys.