I visited this place over 10 years ago and it was vandalized then as well. It has security cameras all over it, and they perform blood sacrifice rituals on the capstone, visible via drone footage if you can find it on the web.
Link to said ritual?
Sorry, bud. I'm pretty busy and don't have much time to spoon-feed these days. Here is a video I found in about 5 seconds doing a quick search. I'm sure snopes would say the suicidal crow from Chris Cornell's song "Like Suicide" kamikaze'd into the capstone, so nothing to see :)
Blood Stains On Georgia Guidestones!? You be the judge. (https://www.youtube.com/watch?v=GRX1GWmUd94))
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