The state is home to a melting pot of ` ` royal '' domiciles . Hearst Castle 's predecessor was Camp Hill , a tract of ranchland on the central California coast acquired by 19th-century mining magnate George Hearst for family campouts . All these palatial estates are open to the public . Henry Ford 's home is a 1 , 100 - foot mansion on Michigan 's Gold Coast . ' Iolani Palace is the only former official residence of a reigning monarch on U.S. soil .
The state is home to a melting pot of ` ` royal '' domiciles . All these palatial estates are open to the public . Henry Ford 's home is a 1 , 100 - foot mansion on Michigan 's Gold Coast . ' Iolani Palace is the only former official residence of a reigning monarch on U.S. soil .