 There are also several other megalithic sites in Brazil that follow the curves of the Rego Grande river.The fact that these Megalithic sites seem to follow such a pattern suggests that Amazon Stonehenge may have been used as either a ceremonial site and that its structure and cultural significance were shared amount different indigenous communities in pre-Columbian Brazil.Despite not knowing the exact use of the Rego Grande site, most scientist agree that it alludes to a pre-Columbian society that was much more complex than previously thought.