This plaque in one of London's oldest public hospitals commemorates the first meeting of two of Britain's most famous literary heroes: Sherlock Holmes and Dr. Watson.

Its collection includes a broad array of social, geographic, graphic design, and political history.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Commemorating the spot where the famous scientist fed his pigeons.

A little slice of Japan and its aesthetics in London's Holland Park.

Rebuilt remains of a temple to Roman god Mithras.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This one has sailed five times as far as Sir Francis Drake's famous ship.

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

Charles Babbage's proto-computer, painstakingly brought to life.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

Pop culture has helped to keep this iconic British building from being destroyed.

Dictionary Johnson’s favorite feline.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

A naturally mummified 2,000-year-old man.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Abstract dinosaur models in London.