There are several things you can do to decorate corner fireplace on horizontally, limited space. First of all, think about good things that have already been there and accentuate it. For example, the way the light goes from the floor to the ceiling, the windows, and it will be good addition if you have high ceilings. The next step, it is good idea to provide some space for the hearth area, for what is a place without hearth? Make sure that there is no damage to the flooring caused by the heat. To top it off, couch or even sofa will go well with the fire place not only in term of functionality but also aesthetic. Last but not least, choose bright colored theme for the whole room.