in the prehistory: for discovery lovers having an explorer soul, we must continue further to the prehistoric site of Abourma, 80km north of Lake Assal. Some sites are exceptionally rich and contain prehistoric rock art. These well-preserved ecosystem, still little trodden by men, remain an open book to be consulted. The rock engraving of Abourma contains another more complex rock art from prehistory. He deliverson nearly 3 km of rock engraving a variety of themes that reflect the behavior, the social stratification and the organization of a pastoral life gone. Othr rock sites are also worth mentioning those of DORRA, BALHO and GUIRRORI.