A sledding hill is sure to burn calories! I love to ski and enjoy all that winter brings to Michigan. Snow for sledding, skiing, snow shoes, snowmobiles, hose drawns sleighs, ice fishing, skating, photography (esp. black and white), and romantic lodges with fireplaces in the cabins! Even shoveling can have its rewards, esp if you require a good work out.
"Most of life's failures are people who did not realize how close they were to success when they gave up."