Over the last hundred years the Djebel Uweinat was the objective of several expeditions, most of them being driven by the intention to find new rock art sites. These explorers mostly stayed at the base of the mountain where the majority of the currently known rock art sites were found. During their two recent visits, the members of the ACACIA team focused their interest on the upper part of the Uweinat and on its smaller, mostly neglected neighbouring mountain, the Djebel Arkenu.
In the upper part of the Djebel Uweinat artefacts and some stone arrangements were found. While no rock art sites were spotted in the upper part, we discuss the function of stone arrangements and rock art from the lower reaches in view of the semiotic processes in which they may have operated. The presentation of the rock art sites found at Djebel Arkenu will also be fitted into an overview of how we interpret the cognitive map of people who used to live in the environment of the two mountains. Furthermore, some background information concerning the landmarking function of the archaeological finds is given which could be a useful indicator of the character of mobility as well as of perception of landscape among prehistoric people.