The abandoned remains of this Victorian brewery hide crumbling bowling alleys and rusting industrial gear.

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

This TV tower once secretly housed a GDR intelligence team.

This concrete residential area doubles as an open-air gallery.

Berlin's beloved bear is immortalized at the Museum für Naturkunde.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

Berlin's old airport.

Floating swimming pool within a moored vessel.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

An old Danish political institution where members of government can grab a drink off the record.

This ordinary street was made infamous by a legendary visit from the devil.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

This museum is dedicated to the first coast-to-coast highway.

An American flag was erected for every day that passed during the Iranian Hostage Crisis.

A museum of anything and everything Stooge.

One of Philadelphia's largest murals resides hidden under this bridge.

A unique workspace where offices reside on pirate ships and inside gingerbread houses.

One of the oldest of its kind.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."