This 18,000-acre refuge for the impressive American bison, a species that once dominated the plains of the U.S., is a great place to see these wooly 1-ton creatures in their natural habitat. Between 300 and 500 bison call the range home at any given time of year. Other species like elk and deer also wander the range. Because of its relatively small size, catching a glimpse of wildlife is not as difficult as it is in some of the million-plus acre parks on this list. The National Bison Range is run by the U.S. Fish and Wildlife Service, which also oversees several other nature preserves in the area. These, coupled with the lands of Flathead National Forest, provide nature-seekers with plenty of opportunities for seeing wildlife.