To the west, across the Wyoming border, is the staggeringly beautiful Devil's Tower National Monument. Spielberg fans will recall that Devil's Tower figured prominently in Close Encounters of the Third Kind. If you've got the time and a car that gets good gas mileage, you may also want to drive to North Dakota or Canada. Be warned that both states named Dakota are huge, and maps disguise actual drive times. You're going to be in your car eight to 10 hours before nearing our neighbor to the north, but once there, Canadian border guards seem uniformly friendly and enjoy suggesting scenic spots on their side.
American guards are less chummy.
Whether you decide to spend your time enjoying nature's wonders or mankind's tourist traps, though, you'll undoubtedly conclude your Black Hills visit with one last, lingering look at Washington, Jefferson, Roosevelt and Lincoln. It says a lot that the chance to gaze up at their chiseled rock faces on Mount Rushmore makes anything else superfluous.