In the late 1950s, amid a dramatic landscape of eroded sandstone pillars, archaeologists unearthed one of the most significant Stone Age finds ever identified. Tools found at the site – hammerstones, axeheads, flints and scrapers – are estimated to be between 60,000 and 100,000 years old. There’s a museum with small, well-captioned displays highlighting some of the discoveries. Isimila is signposted off the Mbeya road to the left, about...