Author Andy Lloyd has written a very interesting post regarding the possibility that Göbekli Tepe in Turkey may be linked to the return of Nibiru.
..."To supplement the warnings in these oral traditions, the ancients constructed complex stone sites to depict the arrival of Nibiru, and warn of what might happen next! This, I suggest, is what Göbekli Tepe was all about. This strange disk on pillar 43 held by an anthropomorphic vulture may be the earliest known depiction of the returning planet Nibiru, shortly to be followed by the cataclysm which almost destroyed the ancient world."