Located 10 kilometres south of Semporna, Skull Hill, locally known as Bukit Tengkorak, is a volcanic rock shelter site as well as an important archaeological site. The slopes of the hill have shards of pottery that have been traced back to over 3000 years ago. The hill is an open archaeological site, with a museum at the base housing various findings from the site. The hill used to be one of the largest sites of pottery making in Asia during the Neolithic period, a practice that continues with the Bajau people of Semporna.