The beautiful art of Georgia O'Keeffe (Two Pink Shells -- Pink Shell 1937); Harold Feinstein (Ligar Screw Shell); Carol Robinson (Melongina Shells); and Denis Diderot (Shells I) includes incredibly intricate depictions of all kinds of shells. They may be the mobile homes of undersea creatures, but their unique shapes, sizes, and colors make for truly breathtaking shell posters. There's something mysterious and soothing about shells. Perhaps it's time to surround yourself with lovely framed posters of these true treasures of the sea.