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

France's national museum of scientific and industrial instruments.

Dedicated to the art of hunting, with juxtapositions of contemporary art.

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

This modest marker near Notre Dame identifies the very center of Paris.

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

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

The celebrated eyesore created by starry-eyed sweethearts.

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

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

Macabre astrological automaton clock dating to the late 1400s.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

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

The arboretum whose marshy soil sucked up the dreams of housing developers.

Where experiments are conducted on all things wood.

Software company Epic Systems has created one of the strangest and largest workplaces of all time.

More than 5,000 contemporary and "historic" mustards from around the world.

A bypass decorated with large wooden troll carvings.

This cave holds a surprisingly colorful variety of geological oddities.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

A bizarre house filled with an astounding array of collections.

A large circus museum with summer performances.

This posh mansion began as a family's estate and ended as the site of a murder ripped from the pages of a pulp novel.

The famed architect designed this Minnesota gas station of the future with a lookout tower.