The Salweyn site lies about two kilometres northeast of Xiis, and it is one of the more significant proto-Somali archaeological sites in the Sanaag region. The landscape is scattered with cairns — stone burial mounds — and carved stelae that researchers associate with a pre-Islamic population who lived along this coast and maintained trade connections across the Gulf of Aden to the Arabian Peninsula. The carved stonework is cruder than the great monuments of the ancient world but no less striking for that: these are markers left by people who thought in long timescales, burying their dead in ways that would last.
Getting to Salweyn requires a vehicle and some determination. There is no marked path and no signage. Ask at Xiis for directions — local fishermen will know the site. Visit in the morning before the heat builds. The site has no protection or management, which means you will likely have it entirely to yourself, but also that it is vulnerable. Treat it accordingly: look, photograph, do not disturb the stones.