Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

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

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

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.