The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

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

This demon atop the Notre-Dame de Paris looks utterly bored.

The video game-themed street art first popped up in the French city.

An ancient ossuary in Rouen.

His "Lionheart" is entombed separately from the rest of his body.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A nearly 100-year-old dining car in upstate New York embodies the golden age of roadside dining.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The final resting place of the "father of special effects."

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

The Sun King's military models, saved from the Louvre.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

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

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

France's most famous cemetery, with some of its most curious tombs.

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

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

Though they've since been renamed, these two streets hint at Dublin's darker days.

The modern birthplace of Irish freedom.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."