Iolani Palace is located in Honolulu, Hawaii, and served as the royal residence of the last two monarchs of the Hawaiian Kingdom, King Kalākaua and Queen Liliʻuokalani. Built in 1882, it is the only official state residence of royalty in the United States and showcases a blend of American and European architectural styles. The palace is now a historic site and museum, offering guided tours that highlight its rich history and significance. Visitors can explore the beautifully restored rooms, including the throne room and the private quarters of the royal family, providing insight into the life of Hawaiian royalty.