I thoughts some might find this very interesting.
http://www.onlinedocumentaries4u.com/2008/05/kogi-from-heart-of-world-elder-brothers.html
The Kogi are an indigenous people living in the Sierra Nevada de Santa Marta mountains of northern Colombia, in South America.
They are the only civilisation to have survived the Spanish conquests and to have kept their individuality. They are perhaps the only indigenous people in the world who, because of the particular nature of their surroundings, have been able to keep themselves apart and sustain their culture inviolate. And not only that.
The one anthropologist who managed to study them in the 1940's and 50's concluded that though they are similar in some ways to the other Indian peoples around the Caribbean, northern Central America and south to the Andes, there are such profound differences that "in the end the Kogi stand alone".
Plus this site for online documentaries: