The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

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.

This colorful and quirky set of pegasus sculptures celebrate the works of poet Zbigniew Herbert.

This enormous 32-foot painting depicts Poland's greatest medieval battle in glorious detail.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

These miniature works of art are hiding in plain sight on buildings around the city.

A Very Low Frequency transmitter you can tune in on your PC.

A railway, a waterway, and a roadway all in one, suspended over a rushing river.

Despite the groans of archaeologists, this astounding groups of Bronze Age petroglyphs have been painted red for tourists.

This declassified Cold War bunker hosts a large collection of Swedish aircraft.

A 200-year-old collection of medical paraphernalia in a historic house.

The world's biggest floating museum in Gothenburg, Sweden.

The charming storybook building now houses a small police museum.

Dedicated to a song so popular the request to "Play Shoreline" became part of Swedish culture.

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.

A tiny village is home to the world's only diner completely devoted to the many varieties of traditional Swedish dumplings.

An abstract monument to a symphonic composer.

A subterranean house of worship carved right out of the bedrock.

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

A cathedral resurrected from the ashes of one of Europe's greatest urban fires.

The giant club-wielding wildman stands proud as the symbol of Swedish Lapland.

Old Danish castle immortalized in Shakespeare's Hamlet.