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

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

Saintly bones pressed into a wax effigy of a Catholic superstar.

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

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

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

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

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

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

The celebrated eyesore created by starry-eyed sweethearts.

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

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

The ruined remains of the airport Claus von Stauffenberg departed in his failed attempt to kill Adolf Hitler.

This abandoned island off the Venetian coast has been a radical monastery, a political prison, and a secret Nazi base.

100 year tradition of fist fights, marked by marble footsteps.

Go inside to really appreciate this 500-year-old technological masterpiece.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

A diverse collection of wax, bone, papier-maché and mummified relics.

The mummified relic of St. Catherine sits forever on a golden throne.

The oldest botanical garden in the world that technically isn't the oldest.

A modest museum in the final home of Italian poet and father of modern Italian, Francesco Petrarca.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

The mummified relic of St. Antoninus.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.