A madman's personal garden filled with 1,000 sculpted heads.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

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

Anatomical cabinet holds unexpected treasures.

These delicate sand pyramids look like naturally occurring gothic spires.

This Italian dam is covered in salt-hungry goats who manage to scale its almost vertical face.

Ancient ruins hidden underneath a modern luxury hotel.

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

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

Venice's island of the dead.

The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

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

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

The world's most active stratovolcano is almost always erupting.

An incredible menagerie of more than 3 million taxidermied animals at the oldest science museum in Europe.

Dramatic sea stacks adorn the coast of this small village on the Adriatic coast.

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

This abandoned Brutalist treehouse is a hidden architectural relic.

A forgotten "city of water" underneath the famous Trevi district.

This medieval Italian town is a sheer (and beautiful) cliffside defense.

A fairytale island floats in the middle of Italy's little-known Lake Orta.

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.

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

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.