Summary: A series of ring-shaped ditches can be found throughout the Brazilian Amazon, which predate the rain forest itself. These structures remain a complete mystery, and archaeologists are unsure what to make of them. It is suggested that they served as burial grounds or a form of defense, but no one knows for sure. Sponsors! Madison Reed - Go to Madison-Reed.com to get 10% off plus Free Shipping on your first color kit with promo code: UNEXPLAINED.
