Here's a video (a slide show, really) with lots of good images of the Brazilian fishing craft known as a jangada. The soundtrack is a jangada fisherman's song. Most of the jangadas shown are of the more modern plank-built buoyancy-hull type, but there appear to be a couple of the log-raft variety. I find the mast, with its adjustable foot and severe curve, to be among the more interesting features of this type.
We've looked at jangadas in several previous posts. For more, see here.
Thanks to Brazilian friend/reader Silvio Antunha for this one.