The highest waterfall in Italy is only "turned on" five times a year.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Dynamite factory turned museum explores the history of explosives.

One of the largest squares in Europe contains an entire artificial island.

This small hermitage is located along an ancient route that connected the Tiber and Rieti valleys.

This long-abandoned village sits across a narrow gorge from a still-inhabited settlement that was once its twin.

Magnificent frescoes decorate the interior of this Romanesque church, which also showcases an unusual phenomenon during winter solstice.

An 18th-century post box used to alert the church of sick and ailing foreign pilgrims.

With its mine closed, this old village is starting to resemble a ghost town.

This monastery built into a cliff hides a perfectly preserved hermit in a glass coffin.

Ancient ruins hidden underneath a modern luxury hotel.

These delicate sand pyramids look like naturally occurring gothic spires.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

More than 450 years ago, an Italian nun became the first woman to paint the iconic subject.

The remains of the left arm of the levitating philosopher-saint are kept in a 13th-century Neapolitan basilica.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

A line of abandoned, alien-like fortresses dot the mountains of North Italy.

The oldest of Venice's plague quarantine stations, designed to keep the medieval city safe from disease.

This subterranean shrine beneath a bike rental store celebrates the iconic Italian scooter.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

This Italian dam is covered in salt-hungry goats who manage to scale its almost vertical face.

This lucky bronze frog was gifted to Madrid by a casino.

An ancient Egyptian temple in the middle of Madrid, Spain.