Its collection includes a broad array of social, geographic, graphic design, and political history.

The commemorative stone column conceals a secret laboratory.

The collection contains over 25,000 items and details the painful dental practices of the past.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

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

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

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

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

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

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

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

The anatomical-pathological collection of a man who changed surgery.

Hear the quietest sound from across the dome.

Eighty million natural history specimens call this gargantuan museum home.

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

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Ming Dynasty necropolis raided during the Cultural Revolution.

The most famous location in China was home to whole dynasties worth of imperial rulers.

Take afternoon tea in a 17th-century almshouse.

The nearly 200-year-old folly has a secret spiral staircase hidden in one of its pillars.

Journey through this open museum where even employees remain true to period.

Huge winged monument in the United Kingdom.