Anyone watching Bright Insight videos on Youtube? Lots of interesting speculation there - guy basically claims that many of the perplexing ancient sites, such as the pyramids, the City of Petra in Jordan, or the recently discovered Gobekli Tepe, are a work of civilizations that existed prior to the cataclysm inaugurated by an asteroid hitting the Earth approx. 12.000 years ago (that the latter happened is now confirmed - there's the crater in Iceland). Kinda like the Ancient Aliens stuff, except, you know, without the ancient aliens part. He certainly raises a lot of interesting questions as to what kind of knowledge would have been needed to build some of these sites, as well as to what their original purpose could be. Granted, I haven't watched all his videos, so it's possible that some historical quackery slips in now and then, but from what I've seen so far, the dude isn't just some sensationalist loon/fraudster. His videos on Atlantis are certainly captivating and if nothing else, he draws attention to things a layperson is probably unaware of.