The Lenggong valley in Ulu Perak is one of Peninsular Malaysia's most important areas for archaeology, as excavations have revealed many traces of Malaysia's prehistory. It is the site of the oldest known place of human activity in the Peninsula. Today it is still a rural area, with small kampungs surrounded by green vegetation and limestone hills. Lenggong can be likened to an open-air museum, and is home to legends, skeletons, cave drawings and precious finds such as jewellery, pottery, weapons and stone tools. Many of the caves in the Lenggong area have revealed evidence of ancient humans having lived and hunted in this area.
The Lenggong Valley was listed by UNESCO as a World Heritage site on 30 June 2012.