Rings of coastline protect each island’s heart, and it’s well worth leaving the beach to explore inland. On the Big Island, travelers dip into the Waipio Valley—scooped out of the island’s north side—or summit the Mauna Kea volcano at twilight to touch the stars above. On Oahu, hikers scale the Koko Head Crater or follow trails of rainbows dancing above the lush Manoa Valley. No matter where they are based, visitors seeking to learn more about the archipelago have options for various guided tours. Paniolo Adventures, for example, guides horseback rides that offer views of the coastline, volcanoes, and ancient historical sites.