A limestone grotto where daylight filters in from below and turns the water a beautiful turquoise. Also home to a small underwater nativity scene.

Destroyed numerous times, this centuries-old bridge has always been rebuilt with its original design.

One of ancient Etruria's most spectacular archaeological sites with impressive necropolises and rugged landscape.

A network of underground water channels that dates back to the Middle Ages.

It took more than 300 years to build this church, which is home to two sacred vessels believed to hold the blood of Christ.

An archaeological treasure trove towers over the valley of Chiavenna.

A long-buried ancient ruin unearthed right in the middle of the city.

This hermitage celebrates the legend of Emperor Constantine's healing from leprosy.

These caves are home to a small church and were used to age cheese.

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

This lesser-known leaning tower is all that remains of the medieval castle of Vernazzano.

Known as the Royal Palace of the Euganean Hills, this often overlooked castle has been home for multiple noble families over the centuries.

Built to be the ideal penitentiary, this abandoned panopticon saw several revolts and even a prisoners' coup.

Sip a Negroni Sbagliato in the bar that invented it.

The Bourbon royal family had this unique octagonal hunting "cottage" built on a tiny islet in Lake Fusaro.

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

A massive bridge forms part of an aqueduct that was deemed an architectural wonder of its time.

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

Italy's third-largest Roman arena gives a peek into the underground operations beneath the ancient spectacles.

A medieval stronghold rising over the ruins of ancient Roman villas along Rome's southern coast.

Built on a medieval synagogue, this church has a burial crypt, tunnel system, and Jewish ritual bath hiding deep underneath.

An unusual resting place built into the hill with an amazing view of Lake Como.

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

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