Thank you for the further information...
Now I know the location, I can check the geology... I understand from a geology colleague that the region where the alleged pyramids are located does throw up unusually shaped hills, but I shall check with him before offering my opinion on that

I will also look into possible historic peoples in that area - it possible they were responsible for the stone blocks that are shown.
I'm not sure what period you were thinking of when you mention the sites, I have heard people stating 30'000 years old, which unfortunately is completely unsubstantiated and highly dubious