Since there's no map, I will explain where it is, so hopefully you can figure it out.
The Sahel is a semi arid region in Northern Africa. More specifically, it is located on the easternmost part of Northern Africa, bordering the vast Sahara desert on the west, and the Red Sea on the east.
This region is very interesting. It is mostly composed of eroded hills and plateaus, which over time got very interesting and attractive shapes, making the region look like it has been taken out of a movie.
There's very little activity in the Sahel, in general, as there's not a lot of people living in this area.