The Fox River offers a unique and memorable itinerary with every kind of landscape from sun drenched praries to the dark forest. Just downstream from Merimack Hill, on the right bank, is an old stone mill structure along with ruins of the dam. Between Sheridan and Ayers Landing there are magnificent outcroppings of Cambrian rock, which is the oldest rock exposure in the state. These rock formation palisades are prevalent along the Fox, and are as scenic as anywhere in the Midwest.