A statue honors the children who fought Nazis in Poland.

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

A fearsome dragon clings to a corner of Munich's city hall.

Go surfing on this urban wave, "hacked" by local surfers.

The footprint of a frustrated devil in Munich's Cathedral.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The secret medieval communication system will whisk your words above the noise of the crowd.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

While this monument tile is shrouded in mystery it also marks the end of the longest ever human chain.

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.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

The oldest housing complex in Riga is a mini timeline of architectural trends.

A black cat protests the City Guild in Riga's Old Town.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

A surreal museum of extraordinary industrial objects.

340-foot statue built to honour the Heroes of the Soviet Union.

Cold war icon and onetime "hole" in the iron curtain.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.