The fairy tale castle of the "fairy-tale king."

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A small island in Lake Garda that was used as a burial site, pirate hideout, and a monastery.

This network of roads is one of the most unique Etruscan creations ever discovered.

Legend said this huge, gnarled tree sheltered the saint during a storm.

A military museum, art park, mausoleum, and architectural oddity all on one fascist's estate.

On the shores of Lake Garda, the ruins of a Roman villa that allegedly belonged to the poet Catullus.

The pristine waters crossing this forest form a hidden waterfall among the dense vegetation.

A semi-abandoned village destroyed by U.S. bombings during World War II dominates the valley of Turano.

Windblown rock formations in an ancient Roman quarry.

Centuries ago, red and white wine poured from the statue's breasts whenever a new Venetian ruler was elected.

The highest waterfall in Italy is only "turned on" five times a year.

A dreamlike medieval church dug into the tuff rock, with unusual carvings and possible traces of the Templar knights.

A fascinating assortment of cave dwellings, medieval ruins, and sarcophagi are being devoured by the forest.

A spiritual sanctuary in a natural cave.

Stumbling upon this whimsical wooded garden is like stepping into an enchanted forest full of philosophical musings.

The abandoned ruins of a failed resort hide on this verdant, picture-perfect island.

Ride a boat through this magnificent underground world, which now doubles as a theater.

This ancient altar emerges from the thick forests to reveal the mysteries of Etruscan sacrificial rituals.

A massive natural rock arch gives the Tuscan mountain its own window to the sky.

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

Virgil's many-mouthed gateway to the underworld.

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

A sunken idol welcomes parishioners to Davy Jones' Locker.