The Avenue of Mausolea is a series of grand palatial tombs.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

A collection of objects supposedly singed by the hands of souls in purgatory.

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.

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

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

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

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

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."

Greenery cloaks this serene sculpture inspired by the famous Lost Gardens of Heligan.

The collection of signage remembers the midcentury pushback against the new neon light.

The remains of a Canadian train crash are now mouldering beneath layers of rust and graffiti.

This Art Deco masterpiece has stood in for some of the most famous buildings in comic book history.

This Elizabethan hedge maze is one of only six in North America.