Also the Nile river was bigger and reached the pyramids of Giza, that is how they transported the stones.

Troof.
Q: Quick, what's the pyramids purpose?

Most researches would say it was to house the tomb of the Pharaoh's. I think is more than that. It was an act of showing off how much greater and advance they were compared to neighboring nations.

I think they were pigeon holed blast caps that kept the monsters out. The real attraction is the miles of tunnel and city underneath

In some theories, yes.

The mountains at the very least.

Water acts as a level by it's nature.

Perhaps there is a hole under the ice and this same ice acts as a dam preventing the oceans from draining into the Earth's mantle as described occurred after the biblical flood.

That would suck.

I know it sounds whacky.

If I've lost my mind, at least I haven't lost my sense of humor.