Gobelki (sic) tepe.
Natufian cultur is even older and It too is a terminal epipaleolithic site also showing walls> Gobekli is one of those sites that the von Denikens and the "alien armies" guys like to parade out as if its some mystery of how clever we think we are without alien intervention.
I recall whe the EGyptian construction of Pyramids were touted as an "alien" assisted public works project of the 4th dynasty. We now know that te very cores of the pyramids are an example of an archeological history of how humans learned to construct the things after many many decades of failures. Also , the very ways that stone and copper tools could be used to quarry out stone are left as temple wall cartouches that show workers grinding and pounding out slabs of sandstones, limestones , and feldspathic granites for different construction purposes. They almost left us BLUEPRINTS.
Jezuz, these Ancient Aliens shows are ENTERTAINMENT for marketing sake---Theres hardly a piece of fact therein except for some good photography. I love it whenever they announce a visit to Gobekli tepe or Puma Punku and discuss how this all hadda be aliens at work,
The stories are well recorded because of partially excavated blocks still in situ, and how these blocks were constructed from the softer ledge sandstones using tooled angular pieces of andesitic rock (which is only mildly harder) .