The Hawaiian archipelago is made up of 137 islands spread over 1,500 miles. Hawaii was the 50th state to join the United States on August 21, 1959. The state capital and Pearl Harbor are located on the island of O'ahu. We visited O'ahu and the big island of Hawai'i in 2006. In 2020 we made a return trip to the big island of Hawai'i. Dora and I know more about the big island of Hawai'i simply because we spent more time there and researched it more.