Since the 1960s, this small village has invited painters to decorate its walls.

The oldest church in Mantua was buried for centuries under the facades of other structures.

A room filled with frescos that make it seem like the walls are crumbling down while giants die in despair.

Inside the small garden of two mid-century apartment buildings stands a centuries-old bell tower, separated from its original church and hidden from view.

Italy's curious field of mud volcanoes is named for being both gross AND salty.

Stuck in the arcade of Casa Isolani are three arrows of mysterious origins.

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

The remains of an ancient Roman city are hidden underneath Bologna's beautiful public library.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

A beloved local artist has been honored with this statue of a man emerging from a toilet.

Two planes stand abandoned after the closure of an aircraft-themed restaurant.

A dead saint, a deadly poison, and a mysterious holy ooze.

A rare example of an octagonal Catholic church.

Inside this medieval defense tower stands a modern residential building.

All that is left of this medieval castle is two towers, both of which now display a visible tilt.

A little sculpture with a large wardrobe.

Cozy basement bar sports an inventory of over 2,000 beers.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

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

This lake’s emerald green waters are a spectacular sight, but it’s not a great place for a swim.

A seemingly endless landscape of pure salt stretches far across Bolivia.

The astonishing collection of an infamous criminologist.

One of the largest caves in the world open to the public.

This Roman monument is surrounded by more recent construction, offering a stark contrast between ancient architecture and the modern urban landscape.