Mansion and shopping center used in the 1975 film "The Stepford Wives."

The former estate of the Guggenheims, part of the opulent Gold Coast that inspired the Great Gatsby.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

The oldest continuously inhabited street in America.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

An abandoned castle owned and ignored by Masons carries a cursed history.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

A castle built by an eccentric medieval enthusiast in rural Ohio.

A miniature world of concrete and stone in Springfield, Ohio.

The only museum dedicated to the history of the "Magic Lantern," a medieval slide projector.

The Ozarks' strangest dwelling.