['Sylvan Lake. Sylvan Lake is often referred to as the “crown jewel” of Custer State Park. ... ', 'Needles Highway. ... ', 'Crazy Horse. ... ', 'Blackhills National Forest. ... ', 'Spearfish Canyon Scenic Byway. ... ', 'Deadwood, South Dakota. ... ', 'Wall Drug. ... ', 'Wind Cave National Park.']