1: A tourism town in Wisconsin that is based around the unique cliff formations that are found only on that small portion of the Wisconsin River. Since its early river days, it has expanded its tourism industry into hotels, waterparks, arcades, and gift shops.
2: The cliffs on the Wisconsin River from which the town is named. From the French word "dalles", meaning "high, layered cliffs".
I stayed in Wisconsin Dells last week.