From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

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

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

This symbol of Polish heritage survived the occupation during World War II, hidden in plain sight.

Come to this Polish museum to take a good, clean look at filth.

An impressive monument to Poland's independence.

Modern art commemorates one of the first military actions of World War II.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

Valletta’s outdoor theatre stands within the ruins of a 19th-century opera house.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

One of the last remaining railway viaducts equipped with a transporter ferry.

A 20th-century naval quarantine center is now a local park.

The oldest statue in the Netherlands has survived relocation, bombardment, and burial.

A bridge that has seen many reiterations over its lifetime.

A condensed piece of China floating in a Dutch harbor.

Rotterdammers' dirty minds gave this Santa a dirty nickname and cursed it to a life of wandering.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

A modern reimagining of a medieval city gate.

A dramatic art installation features a BMW flying out of a building in Rotterdam.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Built by crowdsourcing, this wooden foot bridge saved a part of Rotterdam that was languishing in wait of city funding.

In the Netherlands, one of the world's largest private car collections can be found.

The largest 19th century panorama in the world still in-situ.

A miniature city, once ruled by the Queen of the Netherlands.