An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

A merchant court dedicated to the fictitious King Arthur is heavily adorned with bizarre Renaissance art.

This antique thermometer honors the creator of the first universal temperature scale.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

This Communist-era residential block is one of the longest residential building in Europe.

A statue honors the children who fought Nazis in Poland.

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

Memorial to the lost dead of Gdansk, whose resting places were destroyed during World War II.

These rare statues are one of the few remaining material witnesses to Old Prussian culture.

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

Deep in a Polish forest, this collection of Iron Age megaliths still holds onto many of its ancient secrets.

A haunting deserted hotel is a favorite with artists and photographers.

Polish luminaries and masterful folk art find sanctuary in this unique cemetery.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

Once a giant gingerbread factory, this space now hosts exhibits and workshops on the historic treat.

The site of the first battle of World War II.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

A public urinal so pretty, it was declared a national monument.

This German fountain of a legendary apple wine-loving drink thief will spit on you.

Fantastic views and thousands of love locks.

According to a satirical conspiracy theory that persists today, this German city of 300,000 is a hoax invented by the CIA.

Carved fountains poignantly placed in parks and in front of special monuments.

A monument to the man who almost killed Hitler.