Imagine a town of a million or so inhabitants at the edge of the Sahara desert. It lies directly on the Atlantic coast, but wait, its fringes are some 200m away from the dunes stretching along. These dunes are around 20m high and 30m wide. Behind the dunes lies a depression, a lagoon dried up long time ago. It stretches inward for a mile or so until the endless suite of dunes … [Read more...]