As you ride along I-90 heading to or from the Badlands, you will see enough billboards for Wall Drug to give South of the Border some competition. It's worth checking out. Though partly a tourist trap, it's also a genuinely useful stop. I got a new iPhone cable to replace my failed one, and some fresh earplugs to protect my hearing from the wind at the 80 mph speed limit. There is also a restaurant offering free ice water to all. The buffalo burger was the best I've had in my life.