Museum about life, death, and cannibalism in the Stone Age.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

Catacombs turned marketplace.

This South London cemetery holds the remains of more than 15,000 people.

The world's largest collection of witchcraft regalia.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

The atmospheric road was never meant to be so creepy.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

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

The community pools that the community refused to give up on.

This collection of historic puppets honors centuries of the craft.

A curious collection of mechanical moving figures.

A book bound in the skin of an infamous criminal, along with countless other specimens.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

This series of Scottish caves has no clear purpose other than baffling historians.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This one-time health resort was used by aristocrats around the world.

Where the lovelorn find a home for their sentimental keepsakes.

A musical instrument played by the sea.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

An amusement park on the grounds of an unused nuclear power plant, with a swing ride inside the cooling tower.