The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

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

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

Two stone columns flank the grand Venice square, but there were supposed to be three.

The only museum with its curator—and her pets—buried inside.

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

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

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

Where the lovelorn find a home for their sentimental keepsakes.

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

An ancient knight and a symbol of the city's freedom.

High in the clouds of San Marino sits an ancient tower with some curious prisoner graffiti.

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

Anatomical cabinet holds unexpected treasures.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

An abandoned theme park with a strange and tumultuous past.

The most loyal of little dogs, or a Victorian era publicity stunt?

This one-time health resort was used by aristocrats around the world.

This abandoned Slovenian military barracks has become a punky-political art squat.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

A relic from the Industrial Revolution got a second life as a contemporary performing arts space.