Mos Espa is the Tatooine spaceport that not only Anakin Skywalker called home, but also held the podrace in Star Wars: Episode I. The location is fiction, but the people who live there right now are very real.
After George Lucas and his crew wrapped filming, they left the set standing—much like they did with the recently saved Lars Homestead. Mos Espa, however, wasn't deserted. People moved in.