Michigan's famed ice caves are forming. Where to see them this winter

Cold weather over the past week — record cold in places — has begun to create beautiful "ice caves" in Michigan's Upper Peninsula that attract visitors to Pictured Rocks National Lakeshore and Rock River Canyon near Eben Junction.

"We’ve had very chilly temps over the last couple of weeks, meaning that the ice formations are, well, forming!" Pictured Rocks National Lakeshore said in a Facebook post on Dec. 4.

Viewing ice "caves" and ice formations has become a popular winter activity at Pictured Rocks National Lakeshore and the surrounding area, the National Park Service said. "Water seeping out of the porous sandstone cliffs freezes into spectacular curtains and columns of white ice tinged with blue, green, or yellow hues. The ice generally begins to form by mid-December and remains