The commemorative stone column conceals a secret laboratory.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

The Tudor-style cottage in the middle of the square is not quite what it seems.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.

Black cat statues guard this temple-like Egyptian revival factory.

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

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

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

The remains of the great moral philosopher reside in a university in London.

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

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

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

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

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

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

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

This artist's home turned gallery/museum preserves the creator's love of "Eastern" influences.

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

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

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.

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.

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