Timoudi lies at 359 metres ( 1,178 ft ) in the Saoura valley on the banks of Oued Saoura a large area of sand dunes in the Sahara desert .
Oued Saoura is a wadi that marks the western edge of the Grand Erg Occidental .
Timoudi lies at 359 metres ( 1,178 ft ) in the Saoura valley on the banks of Oued Saoura , a wadi that marks the western edge of the Grand Erg Occidental , a large area of sand dunes in the Sahara desert .