This series of underground chambers contains Europe's largest subterranean lake that is slowly drained each day.

Artfully arranged bones of 5,800 Austrians.

Dine at a legendary after-hours joint frequented by David Bowie and Iggy Pop.

A dilapidated space station with overtones of 'Alien' and 'Bladerunner' featuring a multiplayer games galore.

Taste freshly foraged yarrow and black locust blossoms at this ambitious cocktail bar.

An old tram depot transformed into a vintage car paradise.

This conical hill was built as a testing ground for an engineer known as the Glider King.

Floating swimming pool within a moored vessel.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

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

A surreal museum of extraordinary industrial objects.

A slice of central Asia in the middle of Berlin.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

Its incredible collections are dedicated to preserving Mexico's film history.

This covert museum showcases booties worn by a rescue dog and slippers owned by Queen Elizabeth II.

The underground mall's skylights look like they could be part of a spaceship.

A jewel of the Mexico city skyline now slowly crumbles after surviving an earthquake.

Located in a veterinary school, this macabre exhibit displays the effects of animal diseases.

Beneath the most controversial monument in Mexico City is a cultural center that exhibits only digital art.

At a museum of everyday objects, it is the act of collecting that is really on display.

This crumbling Art Deco movie palace in Mexico City has been abandoned for two decades.

66,000 pieces of art, donated by one of the world's richest men.