A German artist built a home and garden filled with whimsical art pieces, like a massive, operational volcano.

The world's first jet-powered aircraft were assembled by the Germans in this secret factory in the forest during WWII.

Hidden in the forest are the remains of a former World War II chemical plant.

This highrise residential building looks mundane, but hides a water tower and WWII bunker.

Deep in the forest next to Augsburg are abandoned bunkers and bullet traps from the region's military past.

This red London phone booth once stood in front of Buckingham Palace and was used by the queen.

This concrete church spent a period of its history as a World War II bunker.

The world's first and only museum dedicated to dachshunds.

A statue of Vladimir Illyich Lenin guards this abandoned building in the "Forbidden City."

This decommissioned nuclear power plant offers tours of its Communist-era control room and reactor hall.

Medieval ruins on a tiny island amid a flooded lake offer romantic respite to lovers seeking privacy.

The Suurhusen church tower in Germany leans over farther than the famous Leaning Tower of Pisa.

Hidden in the forest are the crumbling, graffiti-covered remains of the factory where most of Germany's explosives were produced during World War II.

These abandoned Cold War-era bunkers are now a designated refuge for endangered bat species.

Named after the German word for "a longingness to travel," this park brings together thousands of city and street signs from around the world.

A stonemason's hilarious revenge came in the form of this peculiarly positioned gargoyle.

Constructed by forced laborers, this submarine pen is now a museum and war memorial.

This ancient oak tree plays matchmaker for singles willing to branch out from the usual dating scene.

Tourists often confuse this beautifully ornate former cigarette factory for a mosque.

A ruined castle stands atop a hill surrounded by dragon lore.

A geothermal energy project gone wrong is fracturing the city's picturesque architecture.

The monumental home of Prussia’s eccentric "Cannon King."

This platform is now a memorial dedicated to those who were deported during the Holocaust.

A top-secret bunker now turned museum, is an eerie look at what life would have looked like in the event of nuclear war.