A bizarre house filled with an astounding array of collections.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

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

Crumbling ruins of the thermal baths that once attracted royals and aristocrats from throughout Europe.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

The world's oldest surviving anatomical theater, where "the dead are pleased to help the living."

A medieval weapon rumored to have been used by the brilliant poet himself.

This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

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

A formerly opulent Italian village is now a crumbling ghost town that no one really knows what to do with.

A fake medieval village in the middle of Turin.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

Italian cave with exceptional acoustics and an unsavory history.

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

An ancient artistic garden parlor full of hidden water wonders.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.

This Tuscan lake hides a 13th century town that is still visible when the water recedes.

An Italian ghost town that fought obscurity, until a mysterious illness brought it to its knees.

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

This abandoned Brutalist treehouse is a hidden architectural relic.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

One of seven Jewish catacombs in Rome and one of only two open to the public.