A peculiar family mausoleum built by a German nobleman captivated by the occult.

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

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

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

This cauldron was said to be hidden inside a church after it was borrowed from a local witch.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

Six peaceful acres in a residential neighborhood dedicated to art and peace.

This millennium-old site reflects a time when sugar was a treasured commodity.

Mobsters came for a soak in the hot springs, and stayed for the illegal gambling and bootlegging.

A folk-art cottage and hotel straight from a Slavic fairy tale.

With no menu and no sign, this 130-year-old taverna doles out affordable home cooking.

This gilded emblem was once stolen by a Cookie Monster impostor, who demanded a charitable ransom for its return.

The country’s largest boat parade honors an infamous Spanish pirate—who never actually existed.

These otherworldly formations were shaped over millions of years by the forces of nature.

A unique configuration of blown glass can be found inside this hotel lobby.

This living legend of maritime history is enjoying a second life.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

The home of the first American-born saint is one of the only curved buildings in New York.

18m long sarcophagus of a constantly growing dead prophet.

A historic bridge no one is allowed to cross.