Stone Age people devised detailed designs for enigmatic megastructures.

Archaeologists in Saudi Arabia and Jordan have discovered the oldest known architectural plans, which detail huge structures used to funnel wild animals such as gazelles into enclosures where whole herds could be slaughtered. The Stone Age hunting traps, known as kites, date back about 9,000 years and were first discovered in the deserts of the Middle East in the 1920s by aircraft pilots. Long converging walls, from hundreds of meters to 5 kilometers long, drive animals toward a large corral surrounded by a number of pits up to 4 meters (13.1 feet) deep. Some of the desert kites were the largest structures built in human history at the time of their construction. More than 6,000 kite structures have been found across the Middle East and central Asia, and they are most numerous in northern Saudi Arabia, southern Syria and eastern Jordan. The archaeological phenomenon has been little studied.