- The U.S. is home to a melting pot of "royal" domiciles
- All these palatial estates are open to the public
- Edsel Ford's home is a 60-room, 20,000-square-foot masterpiece on Michigan's Gold Coast
- 'Iolani Palace is the only former official residence of a reigning monarch on U.S. soil
(CNN)For a country that ditched monarchical rule, America has some of the most intriguing "castles" in the world.