The earliest anatomically modern human skeleton in Peninsular Malaysia, Perak Man, dates back 11,000 years and Perak Woman dating back 8,000 years, were both discovered in Lenggong. The site has an undisturbed stone tool production area, created using equipment such as anvils and hammer stones. The Tambun rock art is also situated in Ipoh, Perak. From East Malaysia, Sarawak's Niah Caves, there is evidence of the oldest human remains in Malaysia, dating back 40,000 years.