Dating garden eden
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.
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.
Most of these standing stones are inscribed with bizarre and delicate images - mainly of boars and ducks, of hunting and game. Functionally, the site appears to be a temple, or ritual site, like the stone circles of Western Europe.
As the carvings on the stones show - and as archaeological remains reveal - this was once a richly pastoral region.
There were herds of game, rivers of fish, and flocks of wildfowl; lush green meadows were ringed by woods and wild orchards. As we began farming, we changed the landscape and the climate.
'To build such a place as this, the hunters must have joined together in numbers.
After they finished building, they probably congregated for worship.
About three years ago, intrigued by the first scant details of the site, I flew out to Gobekli.