Saudi Arabia - The Ancient Walled Oases of Northern Arabia

01	Tayma	27°37’38.68”N	38°32’59.45”E
02	Qurayyah	28°47’10.39”N	36°00’50.04”E
03	Dumat Al-Jandal	29°48’41.18”N	39°52’2.78”E
04	Ha’it	25°58’48.71”N	40°28’32.64”E

North-western Arabia lies between present-day south-eastern Jordan and the desert areas of southern Syria and western Iraq. It is delimited by the northern part of the Red Sea coastal strip, paralleled by the Hejazi mountains which border the north-western interior sandstone plateau of Hisma reaching up to the plateau of Harrah, by the Nefud desert, on its eastern fringes, and by the basin of Wadi Sirhan. Prior to its present arid climate, the region has experienced successive climatic variations with several wet periods providing a favourable environment to human communities especially in the Early to Mid-Holocene period. The so-called “green desert” of that time provided extensive grazing lands, lakes, and high aquifers to Prehistoric nomadic populations whose presence is attested by various remains ranging from Palaeolithic to Neolithic tools and bifaces, petroglyphs, as well as funerary and rituals stone structures.