The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

This 1920s Dutch barge is now a floating bookstore.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

The curios of pharmacist and collector Henry Wellcome.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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

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

Paris' linguistic guide to the international language of, yes, love.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

The celebrated eyesore created by starry-eyed sweethearts.

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

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

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Abandoned railway line circling the city of Paris.

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