Photographers love to explore ways to make their images feel more three dimensional, to make them 'pop' so to speak. It is perhaps a vain pursuit, since a photograph lives in flatland, but that doesn't keep us from trying. Stereo image pairs is one way to go, but it requires you to cross your eyes. My mother always warned me not to cross my eyes because they might get stuck like that. Enjoy at your own risk. Shot on 35mm film using a Kodak stereo camera from the 1950s.