The bloody legend of Raja Bersiong (the King with Fangs) whom was believed to be one of the rulers of ancient Kedah was originated from the Lembah Bujang (or Bujangha in Sanskrit = Big Snake = Dragon ), one of the 2 valleys (Lembah Muda is the other) that covers half of the Sungai Petani surrounding landscape. The other half is the highland of Gunung Jerai. There are two major rivers Sungai Merbok and Sungai Muda that are suitable for aquasport. There are also abandoned open mining/quarry pools that are suitable for water tourism. Gunung Jerai offers an abundance of waterfalls.