The monster at the center of the Darwin Center Spirit Collection.

The television series' iconic giant foot was borrowed from this classical painting.

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

An incarceration museum on the spot of possibly the oldest prison in England.

Catacombs turned marketplace.

A student driver's nightmare.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

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

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

A subterranean shelter remains intact under a busy Paris railway station.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

One of the oldest medical collections in Europe focusing on rare surgical instruments.