A tiny replica of the iconic London landmark hides on the side of the steel structure.

An architectural oddity hides in plain sight on this iconic London bridge.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

The secret wartime bunker built on the platforms of an abandoned Tube station.

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

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

Two plaques commemorate the site of Shakespeare's first theatre.

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

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

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

An artistic tribute to the famous singer, just around the corner from where he was born.

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

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

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

A kaleidoscopic warehouse-maze of handmade neon signs.

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

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