Uphill and downhill are the same road, which is very narrow and uneven. It takes about three hours to complete the journey. Only the top of the mountain has a view, overlooking the whole Waikikiki Beach Waikiki Beach beach, the scenery is still beautiful. If you drive to Diamond Hill, you can either arrive before 8 a.m. or after 8 a.m., you'd better come directly in the afternoon, otherwise the administrator will not let you go without a parking space. Five knives per car, single entry. It takes half an hour to forty minutes from the entrance to the top of Diamond Hill. Remember to wear comfortable shoes. Diamond Peak is the best place to enjoy the scenery of Oahu Island, 360 degrees without dead angle panorama, the scenery is absolutely admirable. But the viewing platform at the bottom of the mountain is very, very small and crowded. Diamond Mountain is a good scenic spot!!