Research and excavation at the archaeological site in Sungai Batu, Bujang Valley in the state of Pahang started in February 2009. This site has been identified as the civilisation complex with an area covering more than 3km², encompassing 90 small hills. Its locations by the riverflow of Sungai Batu and its tributaries, make it unique piece each separate tributary formed its own island. The location of Sungai Batu is important due to its strategic location for trading and defence activities. This site sits 10 km from Sungai Petani and 80 km from Alor Setar. It is located in an oil palm estate near the Merbok-Semeling road.