Wall Drug

If you've been to the Badlands/Mt. Rushmore, you know Wall Drug. If you've ever taken a road trip anywhere from Minnesota to Montana on Interstate 90, you know Wall Drug. (Wall Drug spends an estimated $400,000 on 500 miles of billboards a year.) And if you live in the Midwest and pay any attention to the backs of cars, you've probably seen one of the stickers above. Worth the stop, I promise. If only for the free cold water.