Borkou
Borkou lies south of the Tibesti, where dry valleys from the mountains descend toward the great depression north of Lake Chad. The Enneri Miski loses its water in the ground before it reaches Borkou, helping to feed the springs and pools of the region. Here, beneath the desert sands, groundwater is accessible in low places and sustains pastures and oases. Palm groves around settlements such as Ain Galaka give Borkou its celebrated dates.