Once the most densely populated place in the world, this island is now a ghost town.

Every autumn, this hillside is ablaze with red summer cypress.

A magical place that lets you play in and explore the world of Studio Ghibli.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

This abandoned Olympic skiing facility still bears the scars of the Siege of Sarajevo.

These warring psychedelic crags commemorate an unsuccessful military operation.

Yugoslavia's biggest underground airport lies in ruins.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

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

Surreal riveted sea forts once protected the Kent shores from German attack.

An abandoned stretch of elevated road in the middle of the Brazilian jungle.

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

The only theatre in the world constructed specifically for sound movement.

The ghostly remains of an accidental sea.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.