Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

The "Prussian Versailles" that is as glorious today as when it was built.

Drink among marionettes at this pub inside a historic puppet theater.

A little sculpture with a large wardrobe.

Climb inside an iron crystal magnified 165 billion times its normal size.

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

A surreal statue honoring Prague's favorite literary son.

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

Macabre astrological automaton clock dating to the late 1400s.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A former factory now pays tribute to a local industry fueled by sardines.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

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

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A tiny island home to a former English slave fort.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

Monuments don't get much more metal than these three giant viking swords planted in a Nordic hill.

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

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