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

The final resting place to 300 Victorian-era pets hides inside the city park.

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

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

Eighty million natural history specimens call this gargantuan museum home.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

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

Catacombs turned marketplace.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

A mysterious artist-run cabinet of curiosities and library.

Remnants of a Victorian garden feature sitting in public woodland.

A historic house left in "dramatic still life."

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

The signs of a long buried road can still be found hidden beneath a London sewer grate.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

The largest of London's subterranean rivers and once a mad, bad center of London life.

Rebuilt remains of a temple to Roman god Mithras.

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

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

A tongue-in-cheek arcade where the games are based on everyday life.

The curios of pharmacist and collector Henry Wellcome.