Göbekli Tepe is one of the most fascinating Neolithic sites in the world. It is a tell, an artificial mound dating to the Pre-Pottery Neolithic. It was not used for habitation; it consists of several sanctuaries in the form of round megalithic enclosures. The site lies about 15km north-east of the Turkish city of Sanlıurfa, at the highest point of an extended mountain range that can be seen for many kilometres around.It is a landmark visible from far away (Fig. 1). Its enormous deposition of layers, up to fifteen metres high, have accumulated over several millennia over an area of about nine hectares. Even today, the place has lost nothing of its magic appeal. For example, a wishing tree which stands on top of the ridge is still sought out by the residents of the surrounding area.