There are more than 4,000 Walmart stores across America today. These ridiculously large stores often can take up the size of two football fields. But, what happens when stores shut down? There aren’t many businesses that need that amount of space.When a Walmart shut down in McAllen, Texas, city officials faced the issue of a giant vacant building. They infused urban planning with community development principles to create an innovative community center. Although they could have reached out to another big-box retailer, they opted to transform it into the largest single-floor public library in the United States.