Map Your Walls
Look for books with maps or sketches and frame them. This was a book of US maps that were intended to be used as placemats. My friend and I split the low 12-dollar cost and divided up the book. Frame four or five on the same wall for an interesting centerpiece or frame them one by one and give them as gifts to people. Also, even if you do not know the first thing about using an old film camera, they make for an interesting addition displayed on your bookshelf.