The most interesting thing about Göbekli Tepe the oldest megalith structure discovered, is that a study based on the drawings on the structure correlated with Younger Dryas period might explain why nothing was found about the ancient civilization that built it.
https://phys.org/news/2017-04-ancient-stone-pillars-clues-co...
https://www.newscientist.com/article/2128512-ancient-carving...
Science might just have found the cause for the flood myth that is present in most cultures around the world.