Victorian-era Londoners really wanted to believe this 17th-century cistern was actually an ancient artifact.

Tombstones and enigmatic inscriptions hide within a vault beneath a popular London arts venue.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

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

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

A living memorial to the trees London lost during the Great Storm of 1987.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

The world's oldest family-run magic shop is hidden beneath a bustling London thoroughfare.

This knockout museum lies in a sleepy corner of London.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

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

The Art Deco artwork depicts gilded carriers of deadly illnesses.

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

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

The incredible private taxidermy collection of an eccentric zoologist.

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

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

What looks like a normal building is really a hollow facade hiding a subway vent.

A French artist's vague warning hangs over Belleville.

The personal library of the founder of modern neurology is open to visitors.

A museum which takes visitors to the côté obscure of Paris.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.