Watch Amazon: Longest River in the World (1918) : Full Movie Online Free Documentary by Portuguese Silvino Santos, about the Amazon, its flora, fauna, its inhabitants and among other wonderful images from the beginning of the 20th century with alternating close-up shots of caimans, jaguars and tropical flora with footage of Indigenous rituals--including some of the earliest known moving images of the Indigenous Witoto people--and longer sequences showcasing the region’s extractive industries: rubber, the Brazil nut, timber, fishing, even the egret feathers that were a staple of women’s fashion at the time.