When Rick Grimes comes out of a coma to find himself in a zombie paradise, the hospital he exits in Episode 1, Season 1 of The Walking Dead is the administrative offices of the Atlanta Mission, an organization that "provides emergency shelter, residential discipleship, job attainment, and transitional housing to more than 950 homeless men, women and children daily."
Apparently, the building was under construction at the time of the building, but much of the exterior destruction and bodies were added digitally.

