Megalith
North Africa

Nabta Playa at the southwest corner of the western Egyptian desert was once a large lake in the Nubian Desert, located 500 miles south of modern-day Cairo. By the 5th millennium BC, the peoples in Nabta Playa had fashioned an astronomical device that accurately marks the summer solstice. Findings indicate that the region was occupied only seasonally, likely only in the summer when the local lake filled with water for grazing cattle. There are other megalithic stone circles in the southwestern desert.

At Nabta Playa, located in Egypt and broader region of the Eastern Sahara, there is a megalithic cultural complex (e.g., sacrificed cow burial site, solar calendar, altar) that dates between 4000 BCE and 2000 BCE. Likely part of Copper Age and Bronze Age cultural traditions of megalith-building, megaliths (e.g., dolmens) were constructed in Mediterranean North Africa.
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