Lavena is the village at the end of the road on the eastern side of Taveuni island. The walk is about 3 km one way. On the way to the waterfall and the rock pools at the end of the walk, you will pass long beaches, rain forest, cross the river and meet friendly locals.
You can walk it, rent a kayak or do it on a longboat with a guide. Many options that will suit your style. There is also a lodge with a few rooms and a new bone carving center so you can get so local authentic handicraft.