Fireplace ties a room together like no other piece of interior can. It starts luring book shelves, wine bottles and class in general. With a fireplace, your room is warm both literally and metaphorically. Plus, you can probably cook marshmallows on it, as long as your classy, wine-sipping friends don't see you do it. So here's an inspirational list of fireplaces. You can't just be content with a simple rectangular hole in the wall, you know!
If you're hankering for more interior design ideas, read this post about moss walls! Or you can have a look at this post on creative recycling ideas for interior design. And then there's this post on great sweeping ideas on interior design.