Nabta Playa was once a large endorheic basin (a temporary lake, or "playa") in the Nubian Desert, located approximately 800 kilometers south of modern-day Cairo or about 100 kilometers west of Abu Simbel in southern Egypt, 22.51° north, 30.73° east. Today the region is characterized by numerous archaeological sites. The Nabta Playa archaeological site, one of the earliest of the Nubian Neolithic Period, is dated to circa 7500 BC.