The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A 200-year-old prison that now houses a peculiar crime museum.

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

The decaying ruins of Wales' first asylum for the mentally ill.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

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.

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

One of the world's largest collections of pathological specimens.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

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

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

Catacombs turned marketplace.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

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

This tangled English forest looks like something right out of a fairytale.

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