Embrace of the Serpent (2015) by Ciro Guerra

[Drunk Monk]

Where it fell flat for me was in finding the magical plant all by itself on a rocky outcropping at the very end.  It just seemed a hokey tack-on to give a sense of completion, and it looked so fake.  Probably not needed.  

Fair point.  The end was kinda dumb.  By then, the film had already pummeled us with its 'message'.  I recant my 'great film' comment and reduce it to 'okay film'.