Grand Erg Oriental
The western edge of Fezzan is a land of sand seas and bare rocky heights. The Grand Erg Oriental stretches across the northern Sahara towards Ghadames, where its dunes meet dark, wind-carved hills. Farther south the Ubari sand sea borders the oasis valleys of Fezzan. Rare rain follows dry channels towards the sand, while palm groves mark the places where underground water can sustain cultivation.