The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A naturally mummified 2,000-year-old man.

Giant, friendly pelicans in Central London, the most unlikely of places.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

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

A mysterious artist-run cabinet of curiosities and library.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

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

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

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

A gigantic 10-foot tall stone man.

A mythical bird etched into the face of a rock doubles as the mascot for a nearby school.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

Memorializing the bravery of one young woman facing the monster of her age.

World's first "penitentiary," meant to be humane, drove men insane.