From Abandoned Spaces:
Many times, abandoned buildings will just sit there untouched and slowly fall into ruin. They are often covered in graffiti, decked in spider webs, and they look like something out of a horror film.
McAllen is a town in the southern section of Texas that saw one of its Walmart locations go out of business and sit idle for many years. After the store shuttered, it eventually fell into the property of the city, and the decision was made to turn the building into a public library.
At the size of nearly two-and-a-half football fields, it is now the largest single location public library in the United States.