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

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

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

Egyptian Revival movie palace abandoned for decades and restored in 2013.

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

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

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

A haunting collection of the vanished and disappearing natural world.

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

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

Abandoned railway line circling the city of Paris.

The world's only museum devoted to the wonders of fluorescence.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.