Places ouroborosasunder Wants to Go

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

Venice's "Island of the Mad."

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The glowing blue Nymphaeum of Emperor Tiberius.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

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

Stalactites and stalagmites in a beautifully lit cave.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

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.

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