Add a long plant shelf like @krisreneeautho! She purchased a long piece of wood from The Home Depot, spray-painted it white, then attached it to the wall with heavy-duty shelf brackets.

Make a long wall feel even longer with a floating shelf that stretches from one side of the room to the other. As seen in this space by Urbanology Designs in Dallas, Texas, you don't have to fill ...

Sometimes all you need to make a shelf is a plank of wood, leather straps, and some screws. Small strips of leather (about 1-1/4 inch wide) are wrapped around each end of the wood plank.