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Wadi Bani Khalid in Oman. wts old December Sinkhole Wadi Bani Khalid in Oman Wadi Bani Khalid Oman Myslef Martyna Zambrzycka Millspaugh alt source exifheading User at old WTshared Martynaza wts Original upload log wts page wts WadiBaniKhalidinOman org WTshared Martynaza WTshared Martynaza bytes no Imagecredit