URL：https://get.pxhere.com/photo/light-wheel-tube-spiral-tunnel-gloom-reflection-darkness-black-lighting-circle-symmetry-channel-shape-light-at-the-end-of-the-tunnel-concrete-tube-tunnel-tube-channel-tube-person-in-the-tunnel-1385056.jpg
掲載元：https://pxhere.com/ja/photo/1385056
