A stunning video shows the rare sight of frozen sand formations at St Joseph, Michigan, on December 1, as freezing temperatures sculpted the sand into small caverns.The footage, filmed by Nathan Voytovick of Nate’s Dronography, shows the frozen sand “making little caverns at Silver Beach,” Voytovick told Storyful.“Single digit wind chills and strong winds carve then freeze the sand in place.” Credit: Nate’s Dronography via Storyful