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

This overlooked street light once served as a KGB dead letter box.

This informal museum is a magical trove of anonymous art collected from car boots and flea markets.

Though it's not the largest, this one-kilometer outdoor market is reportedly the longest in Europe.

A secluded green oasis amidst the towering skyscrapers, bears an unusual moniker that reflects one of the city's oldest guilds.

This Art Deco house is home to the world's largest collection of Dora Gordine's paintings, drawings, and sculptures.

Tucked away behind the mansions of Mayfair, this picturesque garden is a hidden London treasure with a spooky past.

A museum that chronicles the interesting and often dark history of the London docklands, once one of the major trading ports of the world.

A wonderfully preserved example of London's 1960s-style high-density, low-rise public housing.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

A mineral spring that became all the rage in 17th-century England.

This peaceful park with centuries of history hides in an overlooked section of South London.

This railroad track was so secretive that it was omitted from all maps.

The Art Deco artwork depicts gilded carriers of deadly illnesses.

The plunge pool is a surviving relic of a rowdy royal residence.

A decommissioned tube carriage within a London museum hosts a regular pop-up supper club.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

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.

Hidden beneath the streets of London is a secret subway that only carried mail.

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