However, the glacier spared this nearly 25,000-acre region, endowing the geologically unique area (which extends into parts of Minnesota, Iowa, and Illinois) with its name. Retreating glaciers leave behind "drift," which are deposits of silt, gravel, and rock. This landscape has none. In its absence, the Driftless Area is left with a dramatic topography of rolling karst limestone hills and valleys, punctuated by the largest concentration of cold water streams in the world. Today, the region is a highlight of America's dairyland, with friendly small towns — including a number of Amish settlements — and well-regarded creameries that turn out some of the country's best cheese.
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