You won’t find many castles or former royal palaces in the United States. So if you’re looking for sprawling, opulent residences on this side of the Atlantic, you’ll need to turn your attention to mansions. And if you’re looking for stranger examples of the form, we’ve provided ten of them for you on this list. Some of the mansions here have a strange history; some are rumored to be the home of paranormal events. Others are noteworthy due to their outlandish or atypical architecture. These buildings offer a cross-section of experiences, from the luxurious to the mysterious to the surreal.