Great names to describe this lake but it is really called Caño Cristales and is located in Serrania de la Macarena, Colombia. To me that river doesn’t look very rainbowy but rather like a stream of blood. Well, you can find yellow colors as well but doesn’t really live up to the other name it has … Rainbow River. Would love to visit it though. Incredible spot for taking some bizarre photos, which I love. You know that. Wondering how the water taste from that stream.