Highway 42 in Door County Wisconsin, was built in the early 1930's and has fifteen curves, in it's unusually twisty stretch, which was the result of a desire to avoid cutting down too many trees

it's near Northport's ferry landing for Washington island and is on the map as the Door County Curvy Highway, Northeast of Greenbay, about halfway between Marionette and Escanaba, out on the peninsula 

https://www.atlasobscura.com/articles/jens-jensen-winding-road-door-county-wisconsin