I saw the show and rather enjoyed it, even though I think most of the "alien sightings" stuff is bs. I just like ancient history, and seeing those cultures continually befuddle us at how freaking smart they were. Thanks to the OP about the map, though. I had never heard of it before and they didn't do a great job of showing how it was a perfect map, anyway.
I really liked the ruins in Bolivia and the massive drawings in the Chile desert. The former especially, I can't fathom how they built that stone wall, if it's true about needed a diamond-tipped tool to cut some of that stone, as well as the sheer weight of it all. Most annoying part of the show to me wasn't so much the lack of dissenting voices, but how utterly awful they were. In particular, I couldn't stand that catholic college professor, that I think was a nun, having the most idiotic, rationalization-free arguments I've ever heard on that channel. Than again, I've purposely avoided Monster Quest...
As for the channel itself, I disagree with the majority. I'm very, very, very glad it is no longer the hitler 24/7 channel. I can't stand modern history, I love ancient/medieval as well as martial arts history. So lately, the channel's been pretty nice. Human Weapon, sadly gone, remains one of my favorite tv shows aired. They just started a show last week Battles B.C., which, once they go to more obscure stuff than Hannibal and David vs. Goliath (the premiere and next monday's eps, respectively), I could really enjoy. Last night was the premiere of Warriors, and was about the Mayans. The host kinda sucks at narrative, but it was still enjoyable, and assuming he gets better at it, will also be a great program. Oh, the History of Sex series that aired not too long ago was also excellent.
Down with constant WW2 footage!