If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

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

Walk through spectacular aisles of hanging meat and wagon wheel–sized cheese at the world's largest wholesale food market.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

The history of radiation is on safe display at the foot of a radiation science laboratory.

Indents in the pavement are all that remain from a grisly death machine in Paris.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

A surrealist timepiece by the artist of melting clocks.

A museum of magic with a Sadist past.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

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

Notorious artist squat renovated into legal studios.

This cobblestoned medieval-style town was entirely constructed in the 1990s and 2000s.

The indecision over what to place in this square was immortalized with a plaque.

The marker that allows students all over the world to be late for class.

The standard measure of Lagom, a measure of what is enough.

A living descendant of the famous tree that helped Isaac Newton develop the theory of gravity.

The Lund University's former gym houses a museum focusing on the creative process of art.