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

Hidden away in a modern library are the remains of one of the 18th century's most celebrated wunderkammers.

The largest medical and anatomical collection in France lies hidden from the public.

This museum houses an imposing skeleton army comprised of creatures great and small.

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

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

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.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

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

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

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

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The boulder on which Alexander Hamilton laid his head as he died can still be visited on the New Jersey coast.

This classic restaurant features a gorgeous mirror-clad room.

A slice of central Asia in the middle of Berlin.

An eerie, derelict amusement park in Berlin.

When this massive wooden temple ran out of rope, they made one out of devotees' hair.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

Two thousand artifacts from around the world collected by one woman who loved to travel.

A beautiful Victorian-era cemetery, complete with a miniature village.