The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

The deepest metro station in the world.

This attraction was abandoned after the Chornobyl disaster.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

Remnants of the city's Soviet history hover over this modern fast-food outlet.

This derelict superstructure was a very important warning system for the Soviet military.

This massive underground salt mine now holds a sci-fi theme park in its depths.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

The place where World War I began.

A former zoo turned public park, where visitors can hang out in the old animal cages.

Come for the gun-toting hillbilly madman, stay for the ice-cream loving basketball bears.

The largest arcade museum in the world chronicles the golden age of video games which ended promptly in 1987.

Scary metal statues adorn some of the signature buildings of Burlington, Vermont.

A gas station and a state sign commemorating the most famous claims of extraterrestrial abduction.

Maybe the only missile installed in a public park, this Cold War leftover was one of the first to carry a nuclear warhead.

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

Beautiful hillside Vermont cemetery with amazing funerary art.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.