An unassuming London park is actually a pilgrimage site for modern clowns.

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

This ancient Egyptian obelisk still bears the wounds of World War I.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

An architectural oddity hides in plain sight on this iconic London bridge.

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

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

The Art Deco artwork depicts gilded carriers of deadly illnesses.

Inside a London bookstore, a fireplace that once belonged to the illustrator responsible for a famous set of tarot cards.

This pub has roots dating back to 1430 and serves as the setting for multiple Charles Dickens stories.

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

Though it's not the largest, this one-kilometer outdoor market is reportedly the longest in Europe.

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

An archive of ceramic eggs painted to record clowns' personal makeup designs.

This historic abandoned train station looks like a stop for ghost trains.

A naturally mummified 2,000-year-old man.

This bunny-eared Moses represents an attempted compromise between two biblical interpretations.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The narrowest street in Paris.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

This emotive sculpture was originally created for the 1878 World's Fair.

This bridge was constructed from the rubble of the infamous Bastille.

A giant silver apple a day keeps the perils of capitalism away.