When the imprisoned pope's remains were finally returned to the Vatican, his heart stayed behind in France.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

The little tuxedo cat survived the trip, then languished in obscurity.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

This fascinating museum in an old water tower holds the world's largest collection of Vodou artifacts from western and central Africa.

There has been an astronomical clock on this spot since the 14th century.

The chaotic studio of one of the 20th century's most important artists has been preserved down to the dust.

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

The oldest public library in Ireland.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

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

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."

This colorful and fiery mural depicts the Irish folk story of the beloved hero Cuchulain.

At this cozy bar tucked down a hidden Galway backroad, Guinness makes the Gaelic come out.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

Sleep in the hay, spin the wheel and eat grain pellets to your heart's delight.

Home to the "Rat King" of Nantes and other wonders of the natural world.

This statue honors the thousands of Allied avians that served and died for France during World War I.