Built to be the ideal penitentiary, this abandoned panopticon saw several revolts and even a prisoners' coup.

A larger-than-life house of cards stands outside the house of a former fashion designer.

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

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

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

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

Architectureal fantasy quarter of Rome.

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

Renaissance villa and gardens complete with a tormented colossus.

Geothermal waterfalls in Tuscany.

This 16th-century monastery has been turned into a surrealist architecture compound.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

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

An ancient artistic garden parlor full of hidden water wonders.

A gorgeous medieval library where the books are kept in chains.

The world's largest bamboo labyrinth is a living demonstration of the plant’s immense potential.