You can incorporate your small cactus plants in your fireplace. Just like this picture, this is a very refreshing idea. Your guests will love this idea.
You can make your fireplace as a storage area. You can place your baskets and blankets in this area. This is perfect for a cold season.
This is a great idea for all those wine lovers. You can install a rack on that area. You can make this area a cool place to hang out.