A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

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

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

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

Catacombs turned marketplace.

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

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

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

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

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

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

Banksy gives themself artistic license with this piece of London street art.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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