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

One of Amsterdam's narrowest houses is located right across the canal from its widest.

The modern birthplace of Irish freedom.

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

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

Experience what life was like in Ireland during the Viking and medieval ages.

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

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

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."

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

This statue celebrating everyday life in Dublin has a few unsavory nicknames.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

Venice's island of the dead.

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

Two stone columns flank the grand Venice square, but there were supposed to be three.

The only museum with its curator—and her pets—buried inside.

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

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Breathtaking and huge 430 year old maps of Italy.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.