The world's first underwater farm is home to more than 700 plants.

This medieval hilltop village was abandoned at the end of the 19th century, after existing for more than 500 years.

This amazingly preserved Doric temple was abandoned before it was ever completed.

Gorgeous views of Italian mountains and valleys form the backdrop of this unique open-air theater.

A collection of collections, including an anatomy museum, the “Cabinet of Physics of Alessandro Volta, a museum of natural history, mineral collection, and much much more...

The sunlight passing through the opening of this huge cave system creates a magical effect.

A magnificent Neogothic tomb hides within this Italian fairytale-like forest.

A medieval fountain lined with 99 unique stone faces whose origins and meaning remain unknown.

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

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

Naturally preserved bodies are eerily staged throughout the crypt in varying poses.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

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

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

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

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

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

An amazing collection of wax anatomical models and terratological models.

This precariously perched fortress was once ruled by a crow-worshipping baron.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

Erotic art covers the walls of the largest ancient pleasure palace.

This only museum in the world dedicated solely to mushrooms.

This unique structure allowed boats to bypass underwater mine barriers in the channel to enter the harbor.