This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

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

The commemorative stone column conceals a secret laboratory.

The Great Fire of London and the regulation of one-way streets both started in this alley.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

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

A relic of Victorian grandeur hides beneath a busy South London road.

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

This coffee shop lies hidden beneath a historic church.

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

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

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

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Abstract dinosaur models in London.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Scattered throughout London are ancient remnants of the city's former bounding wall.

The television series' iconic giant foot was borrowed from this classical painting.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

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

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

The remains of Crystal Palace Great Exhibition of 1851.

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

Hear the quietest sound from across the dome.

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