According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

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

The celebrated eyesore created by starry-eyed sweethearts.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

No one is sure what to do with this WWII shipwreck that sits at the bottom of the Thames, still loaded with tons of explosives.

One of England's most famous churches hides a pair of little known architectural treasures.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

The cruel trial of a 13-year-old boy inspired the creation of this now abandoned reformatory.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.