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

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

A miniature statue of a beloved character from children's literature.

A water reservoir disguised as a castle stands atop a hill in a park in Stockholm city.

There are hidden patterns on the subway seats of some Stockholm metro cars.

A statue that stood at the center of a long copyright battle.

The Swedish flag over this small naval fort signals that the nation is at peace.

Small Easter eggs are hidden in the ventilation holes of the city's newest trains.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

This hidden art nouveau gem was designed by an architect in search of a national style.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This cannonball has been lodged in the church wall since a 1695 bombardment destroyed the city center.

A lovely biographical museum in the artist's home of 24 years.

This modern arts center is built around a gem of late-Baroque architecture.

A little sculpture with a large wardrobe.

Cozy basement bar sports an inventory of over 2,000 beers.

A former customs station on the border of Germany and the Netherlands.

This futuristic German television spire is actually the world's largest digital clock.

Twisted buildings adorn the banks of the Rhine river.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Check the time in 145 countries at once with this East German relic.

After local authorities changed the design, the building's architect, Le Corbusier, wanted nothing to do with it.