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

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

The exact whereabouts of this surreal cabinet of curiosities are rarely the same place twice.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

A priceless collection of the Nation's cryptologic history.

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

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

Eighteen miniature death-scene dioramas.

A unique columnar residence built in the 19th century.

The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.

The oldest surviving wood-frame building in North America is still in the family.

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

This glamorous old building is said to have inspired the Tower of Terror.

This odd California folly seems like it was almost designed to accumulate urban legends.

America's most famous piece of self-built architecture.

Once the gateway to the utopian dream-village of a Civil War embalmer.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

One part local history, 99 parts gruesome haunted house.

Sculpture of a legendary French dragon.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

Cryptic messages embedded in the New York City sidewalk.

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

Gothic tower where Lord Alfred Tennyson wrote the poem "The Sleeping Beauty."