A mysterious concrete hand reaches out from between the stones of Uniwersytecki bridge.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

Atop this former dutch railway office sits an interstellar work of art.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

A memorial dedicated to the 29,000 Istrian freedom fighters of World War II.

A monument to one of Croatia's famous freedom fighters.

A collection of old neon signs from all over Poland line a secluded courtyard.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

After falling into disuse, this imposing department store found new life as a Hollywood backdrop and a theater.

This bust remembers the haunting local legend of a murderous monk.

The silly symbol for an underground protest group is now scattered around the city.

This ex-prison dates back to the Middle Ages.

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

Tower with a double-helix spiral, adorned with letters of the Georgian alphabet.

A literally moving statue of stacked metal giants just continually trying (and failing) to find love.

A Turkish monastery tucked into a cliff wall.

Carefully reconstructed after the Bosnian War, this 16th-century bridge stands as a symbol of the country's enduring multicultural heritage.

Bridge that died in war and was resurected.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A fountain standing as a testament to a doomed alliance.

One of the newest mosques in a city filled with thousands.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.