Wadi Shab is one of the two famous wadis (river beds or valleys) one can stop at along the scenic route between Muscat and Sur. The other is Wadi Tiwi. Wadi Shab can be explored on foot in a couple of hours and the hike is pretty easy and straightforward so suitable for all levels. Wadi Shab is known for its natural swimming pools with crystal clear emerald water. There is also a hidden waterfall in a secret cave that you can access by swimming through a narrow gap in the rocks (not recommended unless you are a decent swimmer).