The largest toy museum in Poland showcases Europe's history of childhood.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Naturally formed rock city in Poland.

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

An underground city of salt.

Europe's second largest ossuary wasn't discovered until 2001.

Crammed inside this grounded passenger plane is a bar that was once a Communist hang out and is now a ratty relic.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

Budapest's Communist-era statues, banished to the suburbs.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Museum dedicated to the terror regimes of Hungary.

Hungarian mummies in beautiful painted coffins.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

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

A pub that is literally in the middle of nowhere, but continues to do business.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A mythically themed self-built sculpture park.

This taxidermilogical collection was assembled by a peltmonger turned animal activist.

Visitors dip into a variety of pools of what was once ice.

A small but immensely extravagant palace built by the "Night King."

The prototype for all Nazi concentration camps.

The fairy tale castle of the "fairy-tale king."