Kano Kristales, beautiful river "flowing in paradise"

Kano Kristales river is located in Serania de la Marrakech in Colombia and is known worldwide because of the range of colors that we have in ourselves, so often described as "the most beautiful river in the world", "the river of five colors" and "river which flows in heaven." Why is this so, check out below!http://www.youtube.com/watch?v=eobqjjYxkIs#t=44