Wadi El Natrun
Wadi El Natrun (Arabic: وادي النطرون, lit. 'Valley of Natron'; Coptic: Ϣⲓϩⲏⲧ, romanized: Šihēt, lit. 'measure of the heart') is a depression in northern Egypt that is located 23 m (75 ft) below sea level and 38 m (125 ft) below the Nile River level. The valley contains several alkaline lakes, natron-rich salt deposits, salt marshes and freshwater marshes.