Waterfall Adventures above Waipio Valley by ATV or buggy. Come join our 3+ hour tour over the former Royal Lands of Hawaii. Waipi'o Valley - the Valley of the Kings - is sacred to Hawaiians to this day. 11-12 miles of activities and scenery, swim in a waterfall pond, have fun, get dirty and watch your husband behave like he is 12. Great talk-story, snacks and beverages provided. Twice daily, 365.