With the Great Lakes nearly frozen over, another natural wonder has re-appeared on the lakes: Ice Caves.
WPBN reports that just north of Leland in Leelanau County ice caves have formed on the eastern side of Lake Michigan.
Wind and wave action push ice along the shoreline with layers freezing on top of each other. This can create piles of ice that reach 30-feet high.
You can read more about these ice caves on WPBN's website here.