The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Shiny Brutalist box commemorates a pioneer of electricity and houses a railway transformer.

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.

Ship-sized kinetic sculptural fantasy.

One of the world's largest collections of pathological specimens.

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

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

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

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

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

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

Murals of the wild parties once held on the frozen River Thames.

Hear the quietest sound from across the dome.

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

A collection dedicated to the treatment of disease, held in London's oldest hospital.

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

This luxury shopping lane has been protected by its own tiny police force for over a century.

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

Eighty million natural history specimens call this gargantuan museum home.

A plaque marks the underground site of one of London's "lost rivers."

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

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