Slobodan Miladinović, Great Sahara is on top of my wishes list, I guess you've been impressed by Atlas mountains. Not sure if Tunisia is safe enough at the moment, but I'm looking forward to go there sometimes. Thank you for the visit!
Alex Mimo, I recommend you to visit Nefta, a small town on the edge of a sandy desert. This is the real experience of the Sahara. When you leave 200 feet from the place, enter the sand and watchthe wind erase your traces.