Lago Agrio, Ecuador

http://www.followtheroad.com/en/rio-napo-guide-from-ecuador-to-peru.html (Trip from Lago Agrio to Iquitos down the Napo river).
http://www.rio-amazonas.banios.com/amazonian2.htm (In Spanish Trip from Lago Agrio to Iquitos down the Napo river).
http://www.hobotraveler.com/ecuadormaps/napo.jpg (sad but useful map).