Egypt–Sudan border

The Egypt–Sudan border (Arabic: الحدود السودانية المصرية) is 1,276 km (793 mi) in length and runs from the tripoint with Libya in the west to the Red Sea in the east.

The border starts in the west at the tripoint with Libya on Gabal El Uweinat and then proceeds eastwards along the 22nd parallel north to Lake Nasser.

[2] The border then briefly veers northwards, creating an area known as the 'Wadi Halfa Salient', before resuming its course along the 22nd parallel out to the Red Sea just south of Cape Elba (Ras Hadarba).

[4][3][2] The Wadi Halfa salient was added to Sudan on 26 March 1899 in order place a rail terminus from Khartoum under Sudanese control.

"[6][7] At present the 1899 border is de facto in effect, leaving Bir Tawil in the unique position of being the only non-polar piece of land not claimed by any country on earth.