Floating swimming pool within a moored vessel.

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

A collection of abandoned typographic signs from Berlin and beyond.

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

One of the oldest cemeteries in Germany was originally used for victims of a cholera epidemic.

Named after a militant urban guerilla, this famous former squat is a graffiti-covered stronghold of leftist culture.

A surreal museum of extraordinary industrial objects.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

A crucified and bearded female saint.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

When this former hospital pharmacy closed in 2013 it already looked like a museum, so they turned it into one.

This historic streetcar system has been running since the 19th-century.

This Gallo-Roman sanctuary is dedicated to Serápis, god of the underworld.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.