It's not satisfactory that we don't know what's under it? 
It's not satisfactory that nobody has bothered seriously pursuing an answer. You don't need to go directly to a place to see what's there. There must be some means of examining the world around us and coming up with at least an educated guess. Even speculation would do for me if it explained something. Then at least you'd be trying. I mean, the rest of the FE theory is speculation. A little more couldn't hurt, could it?
EDIT: I've read through the FAQ, and I find the answers stupid and paranoid. Most of them are rediculously flimsy, many of them are vague, and some of them even avoid the questions outright. If you don't know the answer, don't try to make it look like you do.
Additionally, the logic behind what Professor Gaypenguin wants us to post is seriously flawed. Of particular concern to me is this article:
Is it a sensible questioning of the theory behind Flat Earth?
I can see that you only want us RE'ers to post insensible questions, crippling our arguments from the start. You FE'ers are really poor sports, you know that?