A Museum of Psychiatry in a still-operating mental institution.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Inside this former medieval prison is a collection of objects designed to inflict unbelievable pain and suffering on the human body and mind.

The bronzed skull of a beheaded traitor was affixed to the city gate in the 17th century.

Christ's blood preserved in a Belgian town.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

Walk through spectacular aisles of hanging meat and wagon wheel–sized cheese at the world's largest wholesale food market.

France's national museum of scientific and industrial instruments.

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

A quartet of brightly colored mythical beasts stand sentry at this gateway.

The fountain marks the area where hundreds of accused witches were burned at the stake.

This observatory within Europe's first dark sky park offers stunning views of the night sky.

A 30-acre garden inspired by the principles of modern physics.

This witch statue remembers a time in England's history when fear trumped truth.

A beautiful medieval bridge allegedly constructed by the Devil.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

This amazing trail among the many waterfalls around Ingleton has been enchanting visitors since 1885.

A kaleidoscopic warehouse-maze of handmade neon signs.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

A hundred copies of Antony Gormley's naked body stare out across the water.

This museum has a most unusual location: inside a giant, three-headed elephant.

A treasure trove of pathological, forensic, parasitological, and anatomical specimens.

A limestone wonderland of water and subterranean secrets.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.