A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

This breathtaking monastery was established by Saint Benedict himself 1,500 years ago.

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

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

Ruins of a 10th century church tucked away deep in a botanical garden.

Geothermal waterfalls in Tuscany.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The Cathedral of St. Ambrose has been hiding a special parishioner within its walls.

Renaissance villa and gardens complete with a tormented colossus.

Vast network of air raid tunnels beneath Lombardy's capital.

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

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

A submerged archeological park still holds the wonders of a Roman Sodom.

A 16th-century horror show built in a lovely Italian garden.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A huge old mansion full of thousands of toys, each there to be used and played with.

This strange moor has a song written about it, Bronze Age carvings, and an alien sighting.

This half-finished "city of toys" was almost Italy's own Las Vegas.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.