Not only are there higher hills, the Pyramid of Djedefre, which is now mostly gone, was put on a plateau overlooking the Giza pyramids specifically so Djedfre, who was the sun of Khufu, who built the great pyramid, could say that his was higher than his father's.

The Bible doesn't actually say that the Israelites built the pyramids, but the entire Egyptian pharaonic line would have post-dated Noah, so it still doesn't make chronological sense within the Biblical narrative.