The site of the first battle of World War II.

This former steel and coal plant is now a neon-lit industrial fantasia.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

Room 32 of the Alta Cienega Motel has grown into a shrine to the Lizard King.

The remains of a magnificent medieval fortress that was the capital of a vast empire.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

A rare pod of derelict midcentury Futuro and Venturo houses lines a semi-abandoned beachfront resort outside Taipei.

The world's largest reflecting pool is just two centimeters deep.

Double spiral staircases are not unheard of, but they are very rare.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

This "common-as-dirt" museum celebrates the glory of normalcy.

One of the foremost Sherlock Holmes collections is hidden away at a Toronto library.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

The world’s largest work of glass art hides in this stunning Taiwanese subway station.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

This Costa Rican topiary park is a surreal garden of unearthly delights.

This Quebec estate is home to the elaborate gardens of a self-taught horticulturist.

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

Several times a year, during low tide, two pairs of historic train tracks are revealed on this New Jersey beach.