Numenor and the Grey Havens?!

I was just wondering about Numenor (or however you spell it). The books talk about it, but I haven't gotten a clear picture of what it is or where it is. Also, I love the ending to the trilogy, and how he doesn't tell everything about what's going to happen. Where do they go over the sea? And, what else is the on their Earth? I've only read the trilogy and am slowly working on the Simarillion, so I will figure it out soon, but I was just wondering...... [img]smilies/wink.gif[/img]