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

A grumpy old water goblin guarding an old mill on the Devil’s Stream in Prague.

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

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Macabre astrological automaton clock dating to the late 1400s.

This massive subterranean fissure is known as the "underground Grand Canyon."

During World War II, this rice mill became a Nazi concentration camp.

A memorial dedicated to the 29,000 Istrian freedom fighters of World War II.

An excavation site that signified Hercules in Pula, and a glimpse into the city's Roman history.

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

A musical instrument played by the sea.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

The oldest operating pharmacy in the world features 800-year-old recipes.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

The middle finger of modernity.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

A "miracle" that seems to produce more holy fistfights than holy revelations.

The only quarter of the Old City not dedicated to a major world religion.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.