Explore the complex ecology of this multifaceted nature preserve by riverboat.

Berlin's old airport.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

This historic stone bridge has an entire neighborhood clinging to its sides.

Terrifying derelict military hospital once housed a recuperating Hitler.

Living trees form the structure of an open-air palace.

An intricate and amazing house built by architect Karl Junker.

Where once there was a train station bathroom, there is now this German burger joint.

An eerie, derelict amusement park in Berlin.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

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

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

Walk through Czech history in Prague's largest graveyard.

A collection of weird and wonderful art fills a former houseplant nursery.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

The former home of a trailblazing surrealist is still filled with haunting dolls and grim paintings.

A once-magnificent collegiate church is falling into ruin.

Artwork tucked within the trees greets visitors with surreal sonic experiences.

A Museum of Psychiatry in a still-operating mental institution.

Medical history with an amazing, if frighting, collection of wax diseases on display.

This abandoned Belgian fortress is purposefully being left to nature.