Pe'e Pe'e Falls, which is 60 feet high, is fed by the Wailuku River. The closer you get the more impressive it looks. Getting close requires a short hike down a hill and some rock skipping, according to Hawaii Guide. The multi-spouted falls fills up a small pool at the base. To swim in the pools, follow a trail from the side of the lookout point down to the river. Beware of mosquitoes.