This Roman underground canal was the longest tunnel ever built until the late 19th-century.

A mushroom-shaped outcropping that has come to be the symbol for an entire town.

A schoolhouse and chapel are all that remains of this alpine village.

This constantly evolving art space saved an Italian town from its own crippling reputation.

The remains of this medieval Roman road and lookout towers dot the rugged coastline of southern Lazio.

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

A lonesome Moai stands in a small Italian town some 9,000 miles away from its Easter Island brethren.

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

Legend said this huge, gnarled tree sheltered the saint during a storm.

A rococo room covered entirely in porcelain originally constructed for another royal residence.

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

This is the oldest Roman-made bridge in the city still existing in its original state.

Featuring the last fully walkable parapet walkway in Europe.

An ancient rogue artist community hidden next to one of the world's most glitzy and glamorous cities.

Things seem to roll, flow and run uphill on this short patch of road near Ariccia, Italy.

A medieval Italian village is fighting depopulation with this vibrant annual street art festival.

The pristine waters crossing this forest form a hidden waterfall among the dense vegetation.

Leveled by an earthquake, this Italian village is now preserved as a massive concrete art project.

These pools have been abandoned for over 20 years.

Take a giant yellow bird cage to the top of Elba's highest mountain.

A fascist-era rural village abandoned since the early 1980s.

This ultra-modern burial building would have stacked the dead like a giant filing cabinet.

A 12th-century Italian skirmish gets reenacted with 500,000 pounds of flying citrus.

A rambling museum which honors the beauty in everyday objects.