Americans traditionally haven't had much use for royalty. (There was that whole revolution, after all.) But Hawaii is home to a royal palace — America's only home ever to serve as an official monarch's residence. The 'Iolani Palace in Honolulu was built by King Kalakaua in 1882 and served as the seat of power for him and his sister, Queen Liliuokalani, Hawaii's last monarch. The Greek-revival palace fell into neglect after the monarchy was overthrown in 1893, but it's now a museum and tourist destination.