Pop culture has helped to keep this iconic British building from being destroyed.

Catacombs turned marketplace.

One part local history, 99 parts gruesome haunted house.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

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

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

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

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.

This Parisian café sticks almost exclusively to an ethos of reuse.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

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

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

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

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

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

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

This Parisian fountain is a little bit fantasy and a little bit nightclub.

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.