yadan landforms along national highway g315 in qinghai, china

badlands plateau landscape sand wadi desert geology plain steppe valley mountain soil sea terrain sahara erg horizon dune 315 national highway qinghai haixi prefecture qaidam yadan landform huanggualiang huatugou natural scenery tourism travel selfdriving tour sandstorm man 39aph39 land desolate one car color blue sky texture asia china