There is more to South Dakota than Mount Rushmore. In addition to the faces of four U.S. presidents - George Washington, Thomas Jefferson, Theodore Roosevelt and Abraham Lincoln - a monument to Crazy Horse is also carved in the mountain. Wind cave National Park, the world's second longest cave, is more than an underground maze. Up top sits one of America's last mixed grass prairies. Jewel Cave National Monument is all about calcite crystals. Black Hills National Forest was sacred ground for the Lakota and home to a plethora of Wild West characters. Grasslands meet eroded canyons at Badlands National Park. Custer State Park may not have national standing yet it has nothing to envy. It boasts scenic drives, hiking trails, clear blue lakes, charming lodges and wildlife. A family vacation in South Dakota is about prospectors, Native Americans, bison and homesteaders as well as wide-open spaces.