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

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

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

Secret refuge and museum of the Duke of Florence.

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

One of the largest caves in the world open to the public.

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

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

Venice's island of the dead.

An ancient artistic garden parlor full of hidden water wonders.

A fairy tale castle in modern Rome.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

A Nesting Doll of Churches.

The location of the last witch trials of Italy, known as "The Salem of Europe."

This centuries-old Italian chapel hangs midway down a sheer cliffside.

This Italian foot path winds through the mountains via 52 individual tunnels.

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

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

Where Aleister Crowley taught magick in "La Chambre Des Cauchemars," his "Chamber of Nightmares."

The plague quarantine island home to the alleged "Vampire of Venice."

Virgil's many-mouthed gateway to the underworld.