Uluwehi Falls (Secret Falls) on Kauai is only accessible along the Wailua River. It is no longer a secret as multiple tour companies offer guided tours to the falls. The tours usually include a 45 minute kayak up the river, then a 20 minute walk through the rainforest and then a swim break at Uluwehi Falls. From the Fern Grotto, you can head back down to the confluence of the...