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

These rows of World War II-era bunkers were the scene of some of the infamous Mothman sightings.

A toxic ghost town sitting atop a massive coal fire.

A fiery crater has been burning in the Karakum Desert since 1971.

This uninhabited volcanic island is the most remote in the world.

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Submerged ruins of a Neolithic coastal settlement, where houses, wells, graves and skeletons have been unearthed.

Largest island in the Baltic Sea experiences such idyllic weather that roses bloom in the middle of December.

Abandoned Soviet base once stocked with short and medium range missiles pointed at western Europe.

Ghosts of France's colonial past.

Yugoslavia's biggest underground airport lies in ruins.

Nightmarish example of the unintended consequences of weapons testing.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

Abandoned anti-ballistic missile base.

Underground monastery and fortress.

Steam out your ears for New Year's Eve.

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

Beautiful steampunk ghosts of early Massachusetts.

A charming flea market shop dedicated to retrofuturistic apparati.

A crumbling hospital from the 1850s on Roosevelt Island.

Virgil's many-mouthed gateway to the underworld.

Concrete strongholds stand guard over the Golden Gate.