Located mauka (inland) half-mile past mile marker 11 on the Hana Highway you'll find Haipua'ena Falls. There is a short trail on the far side of the bridge that can give you an up close and personal view of the falls and pool. A larger falls upstream feeds Haipua'ena but the hike is usually slippery and a risk. On our last visit the lower falls was all that was easily visible. We attempted to get to the upper falls, along with some other folks, and none of us could do it (or were not willing to take the risk up the steep and muddy slope). If you're a die-hard waterfall fan, this stop might be worth the trouble to get to the falls. If not, keep on driving... there are better things ahead.