While in Kapaa one day we decided to take a Kayak trip up the Wailua River and swim at Secret Falls and we are glad we did. Well worth the $ and the day we spent. The double kayak was fun and the river beautiful to navigate.The hike up was muddy and slippery (need good water shoes). Lots of fun. Once we arrived at the Secret Falls we had healthy snacks and went behind the Falls and swam out into the pool of water at the base. The falls were flowing very fast and strong as it rained very heavily the day before. One couple had their snorkel goggles with them and could view through the falls, the rest had to hide their eyes and look away due to the strong splash of water. Take goggles. My husband and I were the last to get down to the falls and therefore last out for our group. One in our group took pictures of us by ourselves in the pool and falls- truly looked like we were at a romantic secret falls. The only regret is that we did not get to spend as much time there as we wanted. Next time we might do it on our own now that we know the hiking trail.