Old Kedah Kingdom

Batu Batu is located in Bukit Batu Pahat, Merbok , Kedah. This river is important because of the archaeological site of the Single Valley which is believed to have existed in 535 BC. Ancient Kedah Civilization recorded on this hill is the oldest civilization in Southeast Asia. This civilization is also contemporary with Roman and Greek civilizations.

It functions as a smelting center, trading port, religious ritual as well as an administrative center. It has also found 4 to 7 merchant ships and is estimated to be up to 2000 years old at the base of a lake in the palm oil forest.

In addition, Sungai Batu is known as a center of smelting of iron ore. Melt iron ore into iron before forging and exporting worldwide. Iron is called Qala and this business has occurred as early as 535 BC.