alt Hacker NewsA series of enormous sand walls separate the morocco-occupied region from the sahrawi controlled region. These are one of the largest minefields in the world.
It's impressive to look at satellite images of this. Just a huge sand wall, with hundreds and hundreds of military outposts.
https://en.wikipedia.org/wiki/Moroccan_Western_Sahara_wall
https://en.wikipedia.org/wiki/File:Western_sahara_walls_moro...
In spite of the craziness of the Berm, the funny thing is that the vast majority of foreign travelers passing through have never heard of it. It is out of sight of the Moroccan highway, and obviously something locals won't be talking about.