The Serra da Capivara National Park in Brazil is a World Heritage site.
Many of the numerous rock shelters in the Serra da Capivara National Park are decorated with cave paintings, some more than 25,000 years old. They are an outstanding testimony to one of the oldest human communities of South America.
Here is a nice video from YouTube on the site.
For those who are willing to deal with narration in Portuguese, this is also a very nice video on the Hill of the Capivara World Heritage site:
Brazil is now to join China and Bahrain as the third country to have a UNESCO authorized center for training of people to manage World Heritage sites.