Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

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

This natural gas vent certainly earns its name as the smallest volcano in Italy.

The world's largest bamboo labyrinth is a living demonstration of the plant’s immense potential.

Explore the quarry where the marble was sourced for Michaelangelo's David.

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

A local student's chance encounter with Keith Haring led to the creation of one of Europe's largest murals.

On rare days, this abandoned castle's gatekeepers open its doors, revealing the eye-popping splendor hidden inside.

A 14th-century abbey founded by a forest-loving order of monks now sits in the center of a pristine nature preserve.

Leonardo da Vinci was one of many to find inspiration in this unique, rocky landscape in Tuscany.

During World War II, a number of important sculptures and paintings were moved to this castle for safekeeping.

A museum dedicated to highlighting the extraordinary in ordinary lives.

Famous landmarks and structures from across Italy fill this miniature park.

When occupying Nazi troops detonated a mine below, medieval frescoes were revealed in this small cliff-side hermitage.

Romans built the world's tallest artificial waterfall in 271 BC.

Fountain where visitors can earn a license to be mad.

The world's largest "Christmas tree" is illuminated by hundreds of lights stretching 2,000 feet up the slope of Mount Ingino.

This region of the Perugia municipality has an unforgettable name.

What appears to be an ancient Roman temple is actually a Catholic church.

This medieval mountain town is also known as the "Village of Streams."

A map of Italy made entirely of trees.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

A series of caves, tunnels, and wells filled with fascinating figures and symbols.

Church holding the preserved body of a levitating saint.