The now-overgrown beach resort was once frequented by Yugoslav military elite.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

Gargoyle head that brings good luck.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

The mass grave of the 27 victims of the "Vampire of Hanover."

This beautiful 19th-century temple stands atop the ruins of its predecessor.

A small square plaque marks a failed assassination attempt that could have changed history.

A wunderkammer of exoticism immortalized by Tom Waits.

Executed in 1401, Exhumed in 1878, Stolen in 2010.

Wax models of disease and deformity are on display at this German medical museum.

The Siege of Naarden ended in 1814, but the cannonballs embedded in the town church remain.

A relic of the old jail still stands in its original location.

Nestled in the woods lies this land art project: a hybrid between park, maze and natural monument.

A unique work of automotive art calls this shopping center home.

A market built atop boats is one of the few floating holiday markets in Europe.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

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

A museum dedicated to a Cold War era sausage.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

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