On the top floor of an upscale department store stands a lavish restaurant housed in a replica of a luxury French dining car.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Read a book next to a Midtown waterfall.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

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

This bridge was constructed from the rubble of the infamous Bastille.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

The first green space constructed on an elevated viaduct.

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

How did a French journalist’s grave become the sexiest statue in the cemetery?

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the 20th century.

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

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

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

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

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

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

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

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

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

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

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