Sorry for the hook...
I read a fantastic article of an archeological find in southeast Turkey discovered about 8 years - Gobekli Tepe. It is reported to be about 11,600 years old.
While the gist of the article was about the concept of religion and when it began, I found the "engineering" and "design" of the site to be almost beyond comprehension. This site pre-dates the very primitive Stonehenge site by nearly 6,000 years. While it was constructed of easily manipulated sandstone, the artisan-ship employed is amazing.
What I also found interesting is the quality of the site diminished over generations.
Whether you are interested in religion or not, this is a bit of human history that should be read. I really hope you do.