Deep in a Polish forest, this collection of Iron Age megaliths still holds onto many of its ancient secrets.

Polish luminaries and masterful folk art find sanctuary in this unique cemetery.

Once a giant gingerbread factory, this space now hosts exhibits and workshops on the historic treat.

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

Crosses of all shapes, sizes and colors litter the mountain, the site of a huge yearly Orthodox pilgrimage.

This man-made mound monument was built out of soil from all across the Polish empire.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

This uber-quaint Polish village is known for its habit of painting elaborate floral motifs on just about everything.

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

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Real bones which are said to have belonged to a Polish dragon.

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

Beautifully carved tombstones fill this unmarked graveyard, uniquely situated near the village's famous stone wine cellars.

An eerie, protected forest of old-growth oak trees, many of which are now dead.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

The ruins of a 13th-century monastery that long served as a place of refuge from wars and raids.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

A perfectly preserved hill village where the buildings are painted like white lace.

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

An 18th century monument regularly tagged with unsettling graffiti referencing a 1940s unsolved murder.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.