Wadi Darbat travertine waterfall.
A 500ft high Travertine Curtain blocking the exit from Wadi Darbat. It should really be referred to as Tufa, a precipitate of water containing dissolved carbonate minerals. As the water evaporates it deposits the carbonates that form this spectacular cliff face. During the monsoon period, this can quite often be hidden behind a deluge of water.
David A Lockwood 