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

Trimmed trees grow alongside the graves like topiary tombstones.

100 year tradition of fist fights, marked by marble footsteps.

Time has been frozen at this station since the bombing in 1980—or so it was believed.

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

This modern, multimedia museum takes visitors on an evolutionary journey back in time.

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

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

Go inside to really appreciate this 500-year-old technological masterpiece.

This old medieval prison tower has been a site of astronomical research for more than 250 years.

The pile of books behind the dignified writer gave the statue a most undignified nickname.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

This automated sculpture of two men peeing will spell out text messages with their micturition.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

Two stunning 17th-century libraries and a cabinet of curiosities.