Sahara

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Old marine deposits.
The Sahara was under water during the Mesozoic period.

Acfer plateau, Algeria.
The area was uplifted in the Middle Tertiary

Erosion sculpts the landscapes, progressing in such an area, descending rocky slopes far from all civilization requires a good mastery of your vehicle.

The GPS (Global Positioning System by Satellites) is a good friend on these stretches.

South part of Hammada al Hamra plateau, Libya.

Sun burns everything. You are very lucky if you find a meteorite among these black rocks.

It's often 200 km a day between little plateaus and sandy plains.
Today, the GPS and the precision of satellite maps make it possible to venture off the beaten track, right into the heart of the biggest desert on the face of the Earth.

You steer by GPS on a sea of sand, it's up to you to choose the best way.