This Italian ski resort rose to fame when Benito Mussolini was held prisoner there and then rescued by the SS.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

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

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

One man's quest to fix his toilet unearthed over 5,000 artifacts spanning more than 2,000 years of history.

A massive mausoleum towers over the gravestones in a 19th-century Italian "model village."

A medieval fountain lined with 99 unique stone faces whose origins and meaning remain unknown.

Stumbling upon this whimsical wooded garden is like stepping into an enchanted forest full of philosophical musings.

The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

Naturally preserved bodies are eerily staged throughout the crypt in varying poses.

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

A stunning hermit's shrine on a steep rocky spur in Northern Italy.

Gorgeous views of Italian mountains and valleys form the backdrop of this unique open-air theater.

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

The secret medieval communication system will whisk your words above the noise of the crowd.

The massive steel ring looks like it could be China’s first Stargate.

This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.

The abandoned tanks along this highway are all that remain of a deadly conflict.

The Sighignola summit on the Swiss border offers views so breathtaking it's been named one of the most beautiful places in Italy.

A rare example of an octagonal Catholic church.

The 1,000-year-old abbey is the birthplace of modern musical notation.

Squeezing inside this deep, narrow canyon reveals a festival of desert colors.

A palace-fortress ruin in Indonesia complete with legends of two magical tigers, eight bathing angels, and a wish-granting cannon.