Iolani Palace, Downtown Honolulu

Iolani Palace was the official residence of the reigning Hawaiian sovereign, King Kamehameha, and the only royal palace in the United States.  The Palace was built in 1882, and has been meticulously restored. 

Also on the Palace Grounds is Iolani Barracks, which resembles a medieval castle.  This structure once housed the royal guards, and now houses the ticket office and Palace gift shop.