The archaeologists made the discovery in the state of Amapa, in the far north of Brazil. A total of 127 large blocks of stone were found driven into the ground on top of a hill. Well preserved and each weighing several tons, the stones were arranged upright and evenly spaced. It is not yet known when the structure was built, but fragments of indigenous pottery found at the site are thought to be 2,000 years old. What impressed researchers was the sophistication of the construction. The stones appear to have been laid out to help pinpoint the winter solstice, when the sun is at its lowest in the sky.

Source: BBC