The entrance to the St. Marys River, in the thick of the Lake Superior ice season.
The U.S.-Canada border runs down the middle of the river. Across from Ontario’s Soo International Airport are Waiska Bay and Bay Mills in the Upper Peninsula of Michigan. Just east of the photo are the Soo Locks at Sault Ste. Marie.
This photo was taken by an astronaut aboard the International Space Station during Expedition 22 in 2010.
Original (raw) image courtesy of the Earth Science and Remote Sensing Unit, NASA Johnson Space Center.