There's also a small mountain in New Mexico with structures and a rock with Hebrew written all over it discovered more than a hundred years ago on blam's link to another thread in his post. The camp is dated at a little before Christ. There was a quirk to the writing that wasn't understood until recently and originates from the Hebrew colonies in Spain.
There's also a cave close to me here in Illinois that had 20,000 articles in it from India dated at 3000 B.C., I think it's 3000 B.C. anyway. Burrows cave. If it was a hoax, would a hoaxer carve ancient writing on 20,000 rocks?! :^)