Sungai Merbok was once an important thoroughfare for traders stopping over at the Lembah Bujang (Bujang Valley) trading port during the latter's golden era from the 5th until 13th centuries. In Fact, traders from China, India and the Middle East that had converged the Lembah Bujang port knew Kedah then as Golden Peninsula.

Sungai Merbok has truly left behind many exciting historical footprint that should be explored and researched to unearth its glorious heydays. Along the Sungai Merbok, the mangrove forest from a special attraction where 30 difference species species of mangrove vegetation exclusive found here. The 4,114-hectare forest is one of largest mangrove forest reserves in Malaysia. There are also 80 difference species of rare birds as well as fireflies that could be found along its river banks.