Stuck in the arcade of Casa Isolani are three arrows of mysterious origins.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

Time has been frozen at this station since the bombing in 1980—or so it was believed.

A 13th-century convent where St. Margaret of Hungary spent her teenage years.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

This building has survived for more than a century and remains virtually untouched.

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

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

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

This one-time health resort was used by aristocrats around the world.

A public work of art that also provides some relief from the summer heat.

When this monument to Slovenia's national poet was erected, it's said to have sparked the ire of nearby church authorities.

A whimsical bridge adorned with decorative dragons.

This abandoned Slovenian military barracks has become a punky-political art squat.

Colorful power station with a chimney equipped with a gallery for exhaust monitoring equipment.

A miniature train-ride through Slovenia's largest cave system.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

This beautifully preserved Ottoman house is steeped in history.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

The remains of a military communications outpost still stand on this Greek island.