Egypt · Geography · Hard
Answer: Al-Maghra Depression — The Al-Maghra Depression, located between the Qattara Depression and the Siwa Oasis, is a large, uninhabited, hypersaline basin that marks the northernmost limit of the Great Sand Sea — its salt pans have been commercially exploited since the Roman period for natron, a naturally occurring sodium carbonate used in mummification.
The Al-Maghra Depression, located between the Qattara Depression and the Siwa Oasis, is a large, uninhabited, hypersaline basin that marks the northernmost limit of the Great Sand Sea — its salt pans have been commercially exploited since the Roman period for natron, a naturally occurring sodium carbonate used in mummification.