For nature lovers, hiking tours are the best way to see Oahu's hidden gems. Trek into the lush, wet Manoa Valley to see the famous Manoa Falls or climb up Diamond Head to get a panoramic view of Waikiki Beach and the Honolulu skyline. Combo your tour with a short kayak to Chinaman's Hat so you can scale this mini-island off Oahu's east coast. Hiking tours are your solution to finding an active, natural, outdoor adventure in Hawaii.