The Folklore: The name "Batu Belah" refers to the famous Malay legend of the "Devouring Rock" (Batu Belah Batu Bertangkup). In the story, a distraught mother named Mak Minah was so heartbroken by her children's greed that she fled to a magical rock that would only open its "mouth" to those in deep sorrow. She entered the split rock and was never seen again—a tale often used to teach children about the importance of respecting their parents. The Science: Geologically, this gorge is part of the Setul Formation, which is the oldest carbonate rock in the region. These "splits" are created by hundreds of millions of years of tectonic movements and chemical erosion, where rainwater and river flow gradually widened cracks in the limestone to form the spectacular "hole in the wall" seen today.