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

This serene, turquoise lake in an extraordinary nature reserve showcases a rare natural phenomenon.

A collection of grotesques lines the walls of this Italian villa.

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

A lavish 16th-century mansion filled with spectacular staircases, fantastic frescoes, and gorgeous gardens.

In the world's oldest university is a stunning 17th century anatomical theater carved from spruce.

A sulfuric hellscape in southern Italy.

A young Italian couple has been locked in an embrace for over 6,000 years.

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

A sunken idol welcomes parishioners to Davy Jones' Locker.

A huge enchanting public park just outside the ancient walls of Rome.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

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

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

Natural cathedral designed by Italian artist Giuliano Mauri.

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

Ruins of a 10th century church tucked away deep in a botanical garden.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

Crushed coral and crystals give the sand its signature coloration.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

The glowing blue Nymphaeum of Emperor Tiberius.