Frozen Lake Michigan.

Grand Haven Lighthouse on a frozen Lake Michigan. Image by Rachel Kramer / CC BY 2.0

In another example of people making good use of the freezing weather, a speed skater has made a video of a sprint around a frozen Lake Michigan. April Chernoby took advantage of perfect conditions when the ice was smooth and solid and the sky was blue to take a spin around the lake, past icebergs and the Grand Haven lighthouse. Read more: chicagotribune.com