The only remaining collection of flayed figures made by French "madman" Honoré Fragonard.

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

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

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

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

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

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

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

A mechanized clock where a man fights off a dragon, crab, and rooster.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

A museum of carnival attractions where you are invited to ride the rides.

Abandoned railway line circling the city of Paris.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Notorious artist squat renovated into legal studios.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

The bears may be gone, but their old cages can still be found.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.