Serra da Capivara National Park is a national park in the Northeastern region of Brazil. It has many prehistoric paintings. The park was created to protect the prehistoric artifacts and paintings found there. It became a World Heritage Site in 1991. Its head archaeologist is Niède Guidon. Its best known archaeological site is Pedra Furada. It is located in northeast state of Piauí. It falls within the municipal areas of São Raimundo Nonato, São João do Piauí, Coronel José Dias and Canto do Buriti. It has an area of 1291.4 square kilometres (319,000 acres). The area has the largest concentration of prehistoric small farms in the Americas. Scientific studies confirm that the Capivara mountain range was densely populated in the pre-Columbian Era.