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

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

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

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

The cedar tree in Highgate Cemetery earned its title by accident.

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

The childhood home of Earth's alien chameleon is a humble Brixton flat.

London's largest outsider art museum.

A Roman spa buried deep beneath the City of London.

This secluded walkway overlooks a magnificently wild London green space.

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

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

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

A clock designed to run with perfect accuracy for 10,000 years.

This hidden green space is the city's second largest conservatory.

London's old-school healing garden.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

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.

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