This attraction should be the King Valley of the Big Island of Hawaii. The observation deck overlooks the scenery below the entire valley. There are waterfalls and seas on the edge of the mountain at the bottom of the valley, and there are hiking routes. If there are 4 drives, you can drive all the way to the beach. It takes about 30 minutes to walk down the valley. If you don't have time, it's also very spectacular to see on the observation deck.