A beautiful and abandoned New York subway station from 1904, complete with chandelier.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Mysterious meeting place for UFO hunters near Area 51.

The deadliest diving spot in the world is also a stunning geological marvel.

This house certainly has a unique decor.

This overlooked street light once served as a KGB dead letter box.

An aluminum skeleton brings Chinese mythology to the French shore.

The location of the Bridge of Death and the Gorge of Eternal Peril in "Monty Python and the Holy Grail."

If all members were present at the table, a sixth of the world's wealth would be under the same roof.

This abandoned island off the Venetian coast has been a radical monastery, a political prison, and a secret Nazi base.

Ruins of a Carnegie family mansion on Cumberland Island.

An abandoned whaling station on an active volcano offers hot springs in Antarctica, surrounded by ruined giants of industry.

This Canadian island is a veritable garden of decay with countless abandoned structures dotting the landscape.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

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

Remains of an abandoned coral city.

The world-record holder for the longest bridge stretching continuously over water.

The sullen remains of vessels abandoned in the Port Adelaide River.

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