In pics: sun shines through the Martin's Hole in Switzerland

People watch the sun shine through the Martin's Hole directly onto Elm, in the Canton of Glarus, Switzerland, Sept. 30, 2018. The 22x19 meter wide rock window is located approximately 2,600m above sea level in the large Tschingelhorn mountain. This unusual phenomenon takes place for a few minutes shortly on several days in spring and autumn every year. (Xinhua/Michele Limina)