Swing across the lush trees of the foothills of el yunque rainforest and get a birds eye view of the big islands tropical forest experience the thrill of rushing through the air on this state of the art 8 line zipline system whether you are a zipline enthusiast or a first time adventure seeker this el yunque canopy zipline adventure tour in rio grande a small town in northern puerto rico will be an exhilarating experience youll never forget