Gobekli Tepe: The World’s First Temple? ( massive carved stones about 11,000 years old )
Smithsonian magazine ^ | November 2008 | # Andrew Curry # Photographs by Berthold Steinhilber
http://www.freerepublic.com/focus/news/2130449/posts
Was this what you remember?
Though this is an interesting link, it is not what I remember. The Geographic article was in the 1970s. The site was a settlement mound accumulated to a height of 50 feet. The people had build on the same location all those years, and I think they estimated that each foot represented debris from about a hundred years of living. Since it had not been lived on continuously the final figure was either 8,000 or 6,000 old. I do seem to remember it was in Bulgaria.