Grand Erg Oriental small but ancient settlement of Ghadames at the Libyan frontier. Another and better road from Hassi Messaoud goes south, also crossing the grand erg where it passes a well called "Hassi Tartrat", before reaching the erg's far side. Further south lies the Ahaggar mountains. The cities of Wargla and Touggourt lie outside the western limits of the erg. Nearby, within the accepted boundaries of the "Grand Erg Oriental", the landscape is described as being "practically free from [sand] dunes" evidently due to strong, persistent winds. Petroleum and other hydrocarbons have been extracted in Algeria, from areas in and surrounding the
Erg Chigaga access – it is only accessible by 4x4, camel or on foot – Erg Chigaga remains significantly less visited then Erg Chebbi. Erg Chigaga Erg Chegaga (or Chigaga) is one of two major Saharan ergs of the Sahara in Morocco, the other being the Erg Chebbi near Merzouga. This dunes are located in the Drâa-Tafilalet area about 50 km west of the rural town of M'Hamid El Ghizlane, itself located about 98 km south of the town of Zagora. With a length of approximately 40 km to 15 km width, some dunes are around 60m high (significantly less than the