21 is like a gigantic version of a Polynesian island. There's a volcano in the middle, and it's an absoloutely huge one. The forests aren't very dense. Beaches all around with a few small cliff faces here and there, but nothing too extreme as they don't go on for very long. The waters near region 22 are very calm but very wet. You'd get a lot of rain coming in from this area.
18 is a hard-grounded area for the most part, particularly over the barren mountains, North coast and the lower half of your Eastern coast. The area that would be sort of a 'waist' to the continent would definitely be your most habitable area, where you'd get strong agriculture going. The top of it is bloody cold, and at the tip of the mountains one could argue that it's the coldest point of the entire planet. The Northern coast is cold and barren and during the winter it's always coated in snow.
Other than that, I'm happy for you to make up your own stuff as you go - Proto or I will let you know if we don't like something. Because I just pulled all of that out of my arse. I suppose that's what you do when you're sorting this stuff out. I don't want to get into doing very lengthy descriptions, really, because then I have to keep my eye out so as to enforce how you do things. I'd rather you have flexibility.
