Walk through depictions of the torture inflicted on those who go to Buddhist hell.

The secret wartime bunker built on the platforms of an abandoned Tube station.

A network of concealed passageways lies within a busy London Underground station.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

The last four extravagant street signs of London's historic banking street.

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

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

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

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

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

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

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

The remains of Crystal Palace Great Exhibition of 1851.

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

The signs of a long buried road can still be found hidden beneath a London sewer grate.

The curios of pharmacist and collector Henry Wellcome.

A student driver's nightmare.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

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

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.