The Dells of the Wisconsin River — also called the Wisconsin Dells(from French dalles, or narrows) — is a 5-mile (8-km) gorge on theWisconsin River in south-central Wisconsin, USA. It is noted for its scenic beauty, in particular for its unique Cambrian sandstone rock formations andtributary canyons.
The cliffs, some over 100 feet (30 m) high, and side canyons are closed to the public to protect sensitive ecological features. The viewing of the rock formations by water is a popular tourist attraction in the area. The nearby city of Wisconsin Dells is the center of summer tourist activity, much of it in the form of the theme parks unrelated to the river features.