The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

Handsomely crafted representations of our round planet.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

This simple apartment may have inspired some of the most important theories in the history of science.

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.

Armenian monks at an island monastery in the Venetian Lagoon make a rare rose petal jam.

This frog-themed restaurant was frequented by Picasso, Saint-Exupéry, and more.

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

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

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

The tomb of history's greatest potato promoter is surrounded by tubers.

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

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

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

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

This recessed garden protects thousands of mountain plants by creating its own microclimates.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

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

A haunting collection of the vanished and disappearing natural world.

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

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

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

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