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

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

The commemorative stone column conceals a secret laboratory.

This coffee shop lies hidden beneath a historic church.

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

Museum dedicated to the UK's first charity for abandoned children, with keepsakes of the mothers who left them behind.

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.

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

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

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

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

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

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

London's old-school healing garden.

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

A historic house left in "dramatic still life."

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

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

The curios of pharmacist and collector Henry Wellcome.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

Eighty million natural history specimens call this gargantuan museum home.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.