I've heard a couple of things about the hollow earth theory....and that rememberd me about an old fairytale.
it was about a young prince who had to go down a long way in a new world full of creatures unknown.....could it be that folklor has knew that kind of things or it's just plain made-up things??

I heard a guy talk on Art Bell's show not too long ago about this. Interesting theory, and the guy is going to research it with a fairly decent sized research staff and going into the polar region.

It will be interesting to hear what he finds or doesn't find. His facts he talks about have been mentioned in the past. Some are provable and historically true, some claims are of dubious nature.

I wish him good luck in his quest....