This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

A Nesting Doll of Churches.

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

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

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

Books bound in human skin and H. P. Lovecraft's letters are among a few of the treasures this library has to offer.

A 60-room castle constructed by a horse-racing heir.

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

Mysterious stone tower featured in many alternative histories of the New World.

Oldest synagogue in the United States.

This historic Rhode Island mini-cemetery features a number of headstones run through with mysterious holes.