Valley

MUSCAT, Oman — I can barely see the hole in the rock at the end of the last natural pool. “Just swim in,” says guide Mohammed Khalfan Al Riyami. My body just about fits through the narrow opening. But the passageway opens up a few meters further into a grotto with a small waterfall streaming down into the pool. There’s nowhere to stand and I hold onto the rocks with my fingers. I look around, ...