Maybe you're maxed out on shopping for art for the moment or perhaps you're just looking to mix up your wall decor with some unexpected elements. These folks did it. They all found genius ways to decorate their walls with beautiful and interesting items, no frame required.
A smart (and earthquake proof) above-the bed alternative from Phrom Design Life.
Perhaps this technically IS art, but it's a clever DIY painted directly onto the wall. Via Vintage Revivals