The rugged terrain comprising most of the Driftless Area is distinct from the rest of Wisconsin, and is known locally as the Coulee Region. The steep ridges, numerous rock outcroppings, and deep, narrow valleys in the Driftless Area are in marked contrast with the rest of the state, where glaciers have modified the landscape. The hilly unglaciated landscape is well represented in Wisconsin's Coulee Experimental State Forest, Wildcat Mountain State Park, Governor Dodge State Park, and the Kickapoo Valley Reserve. Karst topography is most prominent in Wisconsin. Eagle Cave in Blue River, WI and Cave of the Mounds, near Blue Mounds, WI, are better known examples. The Driftless Area is located in all or part of Pierce, Pepin, Eau Claire, Buffalo, Trempealeau, Jackson, La Crosse, Monroe, Juneau, Vernon, Richland, Sauk, Crawford, Iowa, Dane, Green, Grant, and Lafayette counties. If the less restrictive definition of the Driftless Area is used (which includes the unglaciated southwestern portion of Wisconsin's Central Plain), then Adams and portions of southern Wood and Portage counties are also included. La Crosse is the principal urban area wholly within the Driftless Area, while the larger Madison's far western suburbs are located on the edges of the area. Small cities and towns are scattered throughout the region. Numerous Amish settlements are also located within Wisconsin's Driftless Area. The U.S. Army maintains a presence at Fort McCoy, Wisconsin in Monroe County between Sparta and Tomah immediately south of the Black River State Forest. The property is used mainly for military training exercises, although troops have also been based there for deployments overseas. The Coulee Region portion of the Driftless Area comprises much of Wisconsin's Western Upland geographical region. The most rugged part of Wisconsin's Driftless area is also called the Ocooch Mountains. Largely rural in character, land cover is forest, farmland, and grassland/pasture; modest wetlands are found in river valleys, and along the Mississippi. Row crop farming is less encountered than elsewhere in the state. Away from the Mississippi, Wisconsin, and other major rivers, much of the terrain is gently rolling, supporting dairy farms. In other areas, the rugged nature of the topography in the region is not conducive to farming, except on ridge tops and in river valleys. The sides of the ridges are often too steep for farming, and are usually forested.