My step father told me about a mountain in NC where there was a knife carved in a big rock and if you followed the knife you would find a tree with marks on it and near the tree was a consealed shaft. H e also described a funny looking hole near the top of the mountain,this is a picture of the hole,I could not look when I went there very much because a hunting club leases it and will not consent a search. the hole is in a rock big as a house and has piles of rocks all around it.please give me a idea from the pictures what made the hole and what could the rocks mean.