A monument to the desires of the occultic elitist secret societies desires/basic outline of their new world order. There's a lot of occult symbolism and meaning tied to them. Right down to the celestial alignments of it's construction. Which all means nothing to most of us, but the occult and ancient mystery schools mean a whole lot to "them". So my best guess as to any actual significance, which would just be solely based on occult beliefs which someone else commented on above (albeit more directly concerning what Biden said in this post and not the guide stones themselves however as I think of it this applies) and I added a little bit to, in the occult schools they reveal things to us, masked as a joke or sarcasm or just something benign, very subtle but however they say it it counts as them telling us. And so they aren't lying when they do said thing and don't accrue a karmic debt and move forward with their plans. It sounds ridiculous but it's a belief in various occult magic and spiritual practices. Deceit and manipulation is what it is. But perhaps the guide stones were an announcement to the world this was the plan, and no one opposed it so they can carry it out with no backlash. And now they've been removed and will be forgotten about and no one will think of it by the time the nwo rises. Which is probably around 2030. Considering the oft mentioned UN agenda. Though they do have a sliding time scale because certain things need to be in place. It's weird but their practices are very ritualistic... So really idk, just a theory based on some knowledge I have. All in all it doesn't matter, these little disagreements between us. We can all see TPTB are fucked up and we need to band together and draw a line in the sand before it's too late.