Hilltop monument to the victory of a new nation in the Franco-Prussian War.

This peculiar museum offers hands-on interaction with seemingly intangible principles of mathematics.

An oversized, oddly designed pedestrian overpass has drawn comparisons to a commode for pachyderms.

A relic of World War I that now exist as a piece of public art.

A diminutive statue that was inspired by the sculptor's own daughter.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

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

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

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.

Too much gossip or just missing curfew could land you in here for a couple of days.

Climb around the high waterfalls on series of iron ladders and bridges within the wildest gorge in the Slovak Paradise.

The only natural cave bath in all of Europe.

This downtown Dallas art installation is always on the lookout.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

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

A futuristic rocket marks the spot where three borders meet.

This artistic fountain display pays homage to this area's theatrical history.

The most impressive of Basel's three remaining city gates.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.