I once spent a couple of weeks exploring the tributaries of the Amazon River in Brasil. The river was just coming down from its peak waters, and one of the things I most vividly remember, aside from some amazing close encounters with river dolphins, was how magical the flooded forests looked as we swam through them. It was very much like the above short video, only with added piranhas sailing through the branches. The water was equally crystal clear. This is the first thing I’ve ever seen that captured the experience!
Video found via BoingBoing.