Were underground cities like Derinkuyu in the Cappadocia region of Turkey built by ancient yet advanced beings, maybe not of this Earth? Were these underground cities built by humans, or were they a gift from pre-diluvian gods to help humans survive the end of the world?

Could the megalithic Easter Island heads connect with ancient structures of Göbekli Tepe, and if so, does that mean they were carved over 12,000 years ago? As scholars examine the bodies of these Moai statues, they reveal links of pre-diluvian cultures.