Leaving behind the Caribbean Sea, we took a sharp turn to the south into brownish waters and have been navigating the myriad of islands that compose the delta of the Amazon since yesterday. We keep discovering new things at every corner of the river; it is an endless succession of wildlife sightings and magnificent tropical settings. This, the largest waterway in the world, is full of wonders, even in this section where humans have been present for at least the last 4,000 years.