A secret waterfall, an incredible hiking trail, walking through rocks in a valley between mountains, jumping in crystal clear blue natural water pools in a narrow canyon, and swimming to a cave with falling water. And ticking off all the boxes, Wadi Shab makes it to the top of every adventurer’s list. Wadi Ash Shab is one of the most famous valleys in Oman, with water descending from the highest mountains of Bani Jaber.