Windblown rock formations in an ancient Roman quarry.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

Every inch of this chapel is covered in craftsmanship from across the world.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

This uncanny fresco celebrating the "triumph of death" was split into four pieces to be moved to another museum.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

Built on a medieval synagogue, this church has a burial crypt, tunnel system, and Jewish ritual bath hiding deep underneath.

The world's most active stratovolcano is almost always erupting.

A medieval wash house where people washed clothes in a river allegedly formed by the tears of a mourning nymph.

Tourists to the mountaintop Sicilian town often overlook its ancient fortifications.

The former atelier of Mario Cassisa is a treasure trove of paintings, sculptures, and artist books.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

A city's controversial tribute to its founder depicts townspeople flashing their bare behinds.

Germany's last remaining Lenin statue has become a lightning rod of debate about the country's divided past.

The natural mummy of the less than chivalrous Knight Kahlbutz.

The traditional Polish croissant, folded 81 times into the shape of a horseshoe, is a legally protected cultural treat.

The first, and perhaps only, monument dedicated to Wikipedia.

An impressive monument to Poland's independence.

A tribute to the first human in space.