This is the site of an ancient copper mine about 25km from the
    gold mine Mahd Ad-Dahab
    (http://en.wikipedia.org/wiki/Mahd_adh_Dhahab ). https://www.googl
    e.com/maps/d/viewer?msa=0&mid=zHyVlGArjT-g.kboHEPf9xDow (Dan
    Sandin) and https://www.google.com/maps/d/viewer?msa=0&mid=zHyVlGA
    rjT-g.kiD5zu5Nu6wE (Dan Sandin). The mine shaft is visible. Thanks
    to Marie-Laure Boulot, Laurence Hapiot, Adel Saad, Steve Cutchin,
    Tom Levy, Neil Smith, Greg Wickham,  and KAUST.