On rare days, this abandoned castle's gatekeepers open its doors, revealing the eye-popping splendor hidden inside.

An Italian hillside ghost town.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

Abandoned medieval hill town.

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

The glowing blue Nymphaeum of Emperor Tiberius.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

Geothermal waterfalls in Tuscany.

Renaissance villa and gardens complete with a tormented colossus.

Stalactites and stalagmites in a beautifully lit cave.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

A submerged archeological park still holds the wonders of a Roman Sodom.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A 16th-century horror show built in a lovely Italian garden.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.