An abandoned castle owned and ignored by Masons carries a cursed history.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

The hallucinogenic center of the ancient world.

A remnant of the Roman army's presence on the coast of Scotland.

Legend says this sacred tree was a gift from goddess Athena.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

These ancient rock graves were featured on the cover of a Black Sabbath compilation album.

Staves, storm-calling, and of course, necropants.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

It's believed Matilda Fitzwalter's life was the basis for the famed literary figure.

Now home to a drinking establishment, this building has a macabre history.

The grotto where Saint Ignatius of Loyola lived as a hermit for nearly a year.

Home to one of the most popular teams in Scottish football history.

A lonely beacon, precariously perched atop a remote sliver of rock.

This Roman archeological site is hidden amid a 1930s housing estate.

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

Also known as "Robin Hood's tree," this tree became a famed location along Hadrian's Wall before it was cut down in an act of vandalism.

This abandoned Victorian-style house was built in 1884.

This castle resides in a valley known for immense bloodshed during the Middle Ages.

This temple was constructed entirely by Roman soldiers.

Legend has it that seven Anglo-Saxon kings were coronated on this stone, located in the appropriately-named town of Kingston.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

This 6th-century church honors St. Tudno, the patron saint of Llandudno.

Described by William Wordsworth as a "World of Wonder."