The Pasemah Highlands, tucked away in the Bukit Barisan west of Lahat, are famous for the mysterious megalithic monuments that dot the landscape. The stones have been dated back about 3000 years, but little else is known about them or the civilisation that carved them. While the museums of Palembang and Jakarta now house the pick of the stones, there are still plenty left in situ. Many are tricky to find, and you'll need your own transport (a guide isn't a bad idea either), but a large part of the appeal is being out in the beautiful countryside with Gunung Dempo looming in the background.
The main town of the highlands is Pagaralam, a fairly gritty city located 68km (two hours by bus) southwest of the Trans-Sumatran Hwy town of Lahat. Here you'll find ATMs, lodgings, restaurants, tour guides and general supplies.