Morning light slides over the Gulf of Oman as Highway 17 traces the coast east from Muscat, cliffs rising and the sea flexing alongside. By the time you reach Tiwi, the mountains open to a sandstone corridor: Wadi Shab. The trail wastes no time—after a brief boat shuttle across the irrigation channel, you’re walking packed gravel and palm-shaded terraces, the wadi narrowing into a corridor of honeyed limestone. The path hops from ledge to ledge, then yields to pools that insist you swim to continue. The water is cool, glass-clear, and it nudges you forward, pushing you deeper into the canyon’s quiet.