Built on its own island in the St. Lawrence River, Boldt Castle was commissioned by George C. Boldt, a millionaire hotel magnate, for his beloved wife, Louise.
America's only royal palace, 'Iolani Palace is the former home of King Kalakaua and his sister Queen Liliuokalani.
George Washington Vanderbilt, the youngest son of railroad and steamboat tycoon William H. Vanderbilt, inherited his fortune from his father.
John Hays Hammond, Jr., known as "The Father of Remote Control," built his castle between 1926-1929 as a wedding present for his wife Irene.
Henry Chapman Mercer was an American archaeologist, anthropologist, antiquarian, and ceramist.
Moultonborough, New Hampshire, is the location of the stunning castle "Lucknow", originally the home of Thomas and Olive Plant.
Located on the Central California coast, William Randolph Hearst's home is one of California's top attractions and one of the most stunning in the United States.
The story behind Scotty's Castle, located in Death Valley National Park, California, is even more fascinating than the home that bears his name.
The last on our list of awe-inspiring castles in America is Oheka Castle, popularly known as the Otto Kahn Estate.