And we're still not finished with Hawaii's mountains. Mauna Kea has more astronomical observatories in one location than any other place in the world.
Plus, the best volcano show in the world is in Hawaii at Kilauea on the Big Island. And for an experience that will seem otherworldy, visit Haleakala National Park on Maui.
Back down closer to sea level, you can run through the world's largest maze on the Dole Plantation on Oahu. And you can visit the Parker Ranch, which at one time was the largest cattle ranch in the U.S. and in one way still is. Plus, another vacation stop can be the monument to Captain Cook, who thought the Hawaiian Islands should be called the Sandwich Islands.