The giant skeleton sculpture is surprisingly well-traveled.

Da Vinci's equestrian statue, 500 years in the making.

An ancient artistic garden parlor full of hidden water wonders.

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

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

The oldest botanical garden in the world that technically isn't the oldest.

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

Go inside to really appreciate this 500-year-old technological masterpiece.

The middle finger of modernity.

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

An incredible menagerie of more than 3 million taxidermied animals at the oldest science museum in Europe.

Renaissance villa and gardens complete with a tormented colossus.

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

Contains some of the world's more disturbing wax anatomical models.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

Geothermal waterfalls in Tuscany.

Water and windows define this defensive Italian well.

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

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

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

Southern Italy's spinning top village.

A unique form of erosion created an uncanny landscape of boulders perched atop slender columns of clay.

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

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.