Check out this awesome overview of the 20 longest rivers in the world by continent for your world travel bucket list, including the Amazon, Nile, Yangtze, Mississippi, Yenisei, Congo & more. via @GreenGlobalTrvl  #Rivers #BestRiverstoFloat #BestRiverstoKayak #BestRiversintheWorld #AmazonRiver #NileRiver #CongoRiver #YangtzeRiver