Where the heck is Wall Drug?

I have seen these signs on the highway and bumper stickers since I was a kid.  This was the first time we actually stopped in Wall, SD to visit Wall Drug.

Wall would normally be a sleepy town at the entrance of the Badlands, but because of Wall Drugs, its actually a destination.  They are the master of marketing, with goofy slogans and signs placed hundreds of miles away along the highways. They also give out those bumper stickers for free.

Wall Drug was started as a regular drug store. To draw travelers to their store, they offered free ice water. Now they offer coffee for five cents, goofy statues to take photos with, western themed gifts, and cafeteria style food and I'm sure much more that we missed.