Original: Nabta Playa was once a large basin in the Nubian Desert, located approximately 800 kilometers south of modern day CairoArchaeological Institute of America or about 100 kilometers west of Abu Simbel in southern Egypt,Comparative Archaeology Web 22° 32' north, 30° 42' east.
Simplified: It is about 500 miles south of modern day CairoArchaeological Institute of America or about 100 kilometers west of Abu Simbel of southern Egypt,Comparative Archaeology Web 22° 32' north, 30° 42' east.