In March 2018, PROBA-V captured this beautiful image of the confluence of wadis, or valleys, in the Dhofar region of Oman. The wadi system is just to the south of the the Rub’al Khali or “Empty Quarter”, the largest contiguous sand desert in the world. The agricultural oasis of Shishr (or Wubar), with pivotal irrigation using aquifer water, stands out in red. Its name bares reference to a sink hole or well. The site shows remnants of a fortified water stop, used in the ancient caravan trade routes for frankincense. This resin was produced in the wadis and distributed through the ports of Khor Rori and Al Baleed for over 15 centuries. In the KidSat project, American students, using Remote Sensing techniques, including LandSat and SPOT satellite imagery, contributed to the discovery of the ancient roads under the sands, back in the late 1990s.