America's Most Iconic Drives: Great River Road, Minnesota to Louisiana - You might expect small-town charm driving alongside the Mississippi River. You might not expect the rugged “Driftless Region” on the road’s more northern stretches—an area that escaped being flattened by glaciers during the last Ice Age. Enjoy roller-coaster hills and steep canyons in Iowa, from Dubuque to the prehistoric Effigy Mounds.
15,000 years ago, 2/3 of what is today Wisconsin lay under the grip of colossal ice sheets. The climate warmed and they began to melt back. In their wake, they left an impressive glacial landscape of fascinating landforms - moraines, drumlins, kames, kettles, eskers, outwash plains, erratics, meltwater channels, potholes, driftless (unglaciated) topography, glacial lake beds, islands and more. justintrails.com
America's Best Fall Color Drives: The Driftless Region, WI