Repository for more than 22 million pickled specimens.

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

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

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

London's smallest police station is barely the size of a phone booth.

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

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

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

The anatomical-pathological collection of a man who changed surgery.

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

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

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

Eighty million natural history specimens call this gargantuan museum home.

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

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

One part local history, 99 parts gruesome haunted house.

A hands-off space for graffiti artists to hone and display their skills.

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

An unusual round church in London with a Templar past.

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.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

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

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