The picturesque heart of the Copper Country, Keweenaw County is the northernmost and least populated county in Michigan. With epic snowfall levels and the rugged Keweenaw Ridge plunging down to Lake Superior it is easy to see why this area is rich in waterfalls. Many of the drops here flow over conglomerate rock near Lake Superior, though there is still a scattering of tougher volcanic riverbeds close to the mountainous ridge.