This mouldering abandoned mental hospital was once a center for progressive healing.

This historic graveyard monument is dedicated to a tragic victim of witch trial hysteria.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

This trio of stone spires claims to be the only preserved medieval execution site in Europe.

Bring out your dead (saints that have been festooned and bejeweled, so that we can parade them around the town)!

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

This awesome Spanish castle is so fantastical it was actually used on Game of Thrones.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

Ruins of an American Civil War iron forge still survive today.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

This artist's home turned gallery/museum preserves the creator's love of "Eastern" influences.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

New England's tallest light house stands on an island with a history of cannibalism and death.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

A grotto replicating one of the world's most famed Marian apparitions sits across the ocean from the original.

This logic-defying 16th-century Tudor manor still stands to the delight and astonishment of onlookers.

Despite being burnt down multiple times, the ruins of this South Carolina church are still standing.

This 13th century castle is chock full of ghosts and impossibly rare cows.

A sculptor's dream castle turned fantastical ruin.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

The library of every book lover's dreams.

A ruined castle has more than its fair share of legends and ghost stories.