To date, 45 of these stones have been dug out - they are arranged in circles from five to ten yards across - but there are indications that much more is to come.
Geomagnetic surveys imply that there are hundreds more standing stones, just waiting to be excavated. If Gobekli Tepe was simply this, it would already be a dazzling site - a Turkish Stonehenge.
About three years ago, intrigued by the first scant details of the site, I flew out to Gobekli.
It was a long, wearying journey, but more than worth it, not least as it would later provide the backdrop for a new novel I have written.
Back then, on the day I arrived at the dig, the archaeologists were unearthing mind-blowing artworks.
As these sculptures were revealed, I realised that I was among the first people to see them since the end of the Ice Age. Over glasses of black tea, served in tents right next to the megaliths, Klaus Schmidt told me that, as he put it: 'Gobekli Tepe is not the Garden of Eden: it is a temple in Eden.' Seen in this way, the Eden story, in Genesis, tells us of humanity's innocent and leisured hunter-gatherer past, when we could pluck fruit from the trees, scoop fish from the rivers and spend the rest of our days in pleasure.
For the old Kurdish shepherd, it was just another burning hot day in the rolling plains of eastern Turkey. Crouching down, he brushed away the dust, and exposed a strange, large, oblong stone.
Following his flock over the arid hillsides, he passed the single mulberry tree, which the locals regarded as 'sacred'. The man looked left and right: there were similar stone rectangles, peeping from the sands. The solitary Kurdish man, on that summer's day in 1994, had made the greatest archaeological discovery in 50 years.Calling his dog to heel, the shepherd resolved to inform someone of his finds when he got back to the village. Others would say he'd made the greatest archaeological discovery They got in touch with the German Archaeological Institute in Istanbul. Archaeologists worldwide are in rare agreement on the site's importance.And so, in late 1994, archaeologist Klaus Schmidt came to the site of Gobekli Tepe (pronounced Go-beckly Tepp-ay) to begin his excavations. 'Gobekli Tepe changes everything,' says Ian Hodder, at Stanford University.The site of Gobekli Tepe is simple enough to describe.The oblong stones, unearthed by the shepherd, turned out to be the flat tops of awesome, T-shaped megaliths.Imagine carved and slender versions of the stones of Avebury or Stonehenge. The stones seem to represent human forms - some have stylised 'arms', which angle down the sides.