These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

This watchtower once presided over the Berlin Wall.

Tiny memorials honor individual victims of the Holocaust.

Steadily reminding Czechia of its past.

A surreal statue honoring Prague's favorite literary son.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

Where the lovelorn find a home for their sentimental keepsakes.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

This 135-year-old weather station studied the effects of the climate on human health.

Sweden's southernmost point is located in this charming fishing village.

A public display of random paleontology.

Where royalty waits in the height of luxury.

This cheese shop also houses a museum devoted to Dutch dairy.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

Europe's official "zero-level," the equator of elevation.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

Amsterdam's former hotspot for public executions and dissections.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

The sweet story of how American cargo planes became known as "Candy Bombers" during the Berlin Blockade.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This millstone commemorates a gruesome tale that may have been the source of the city's name.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.