Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

The famous winding walk at Chartres is surrounded in mystery and myth.

Peeing dogs guard the Roman hunting goddess atop a fountain at France’s Château de Fontainebleau.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

Former hunting lodge of a duke who was an avid collector of impressionist works.

Abandoned railway line circling the city of Paris.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

France's most famous cemetery, with some of its most curious tombs.

A French artist's vague warning hangs over Belleville.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

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

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

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

This massive library holds what was once the largest book collection in the world.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

A surrealist timepiece by the artist of melting clocks.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

France's national museum of scientific and industrial instruments.

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

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

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

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.