The Tibesti Mountains remain off-limits but Ennedi desert is just as weird and wonderful. Attractions include prehistoric cave paintings, slot canyons, desert lakes and some unbelievably bizarre rock formations. There are even ancient sea arches, now swimming in sand dunes, formed when Lake Chad stretched out here.
The area is also home to some stunning wildlife such as the Nile Crocodile and was the home of the last Saharan lion.