Opaekaa Falls (Top Kauai Attractions & Sights), Kauai tours & activities, fun things to do in Kauai | HawaiiActivities.com Opaekaa Falls is a beautiful, 150-foot waterfall found in Wailua. Known for being one of Kauai's most easily accessible waterfalls, you can view the majestic falls from a vista conveniently located on the side of Kuamoo Road. The name opae-kaa (shrimp-rolling) comes from the days when there were many freshwater shrimp in the stream, a lot of which would roll down the waterfall into the pool below. Opaekaa Falls flows year round, so it's worth visiting for anyone on the East Side.