CLEAN : Snow and bitter cold freeze US midwest

The transcript describes a person's experience with cold weather, including frostbite and the need for better gloves. They explore the thickness of ice and enjoy skating on it. With a day off from construction work due to the weather, they visit the art hill, a popular sledding spot, despite the negative temperatures.

What did the speaker do on their day off?

Describe the location the speaker visited for sledding.