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

The site of the first battle of World War II.

Naturally formed rock city in Poland.

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.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

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

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

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

Countless stories attempt to explain Poland's mysterious J-shaped trees.

Hundreds of small crosses have been carved into the bark of the trees outside this small Estonian village.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

A secluded art gallery hidden within the cellars beneath Tallinn’s medieval monastery.

Tombstones buried in overgrown grass mark the deceased occupants of this abandoned graveyard.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

A decommissioned submarine base makes a great space for graffiti art.

This small Estonian hill is covered in hand-made twig crosses that are said to bring good luck.

Man-made mineral caves house massive bat colony.

This disappearing geyser has been attributed to witchcraft, but really it's all about rainfall.

Mysterious craters may have been home to an ancient cult.

"There's nothing there," and other lies the KGB told us.

Surreal works of unreal stone and metal dot the landscape of this Latvian art park.

Built to ward off Napoleon's army, this city-sized abandoned Russian fort is now perfect for urban exploration.

Guests become prisoners on a visit to Latvian prison.