When conditions are right, the ice sheets that form on bodies of water in winter will break, and the motion of the wind will cause the pieces to slide and stack, causing ethereal, hypnotic scenes like the ones in this video from the Lake Superior coast in Minnesota. 

Dawn M. LaPointe of Duluth's Radiant Spirit Gallery took the video on February 13 on Brighton Beach in Canal Park. She says the ice was 1/4" to 3" (0.6 to 7.6 centimeters) thick and sounded like breaking glass, which you can hear in the video.  

"The sparkles visible in some segments were from the sun gilding the frost flowers that had formed on top of the new ice overnight—icing on the cake!"