McDonough Depot There's a depot under here. Southern Railway's former McDonough depot is now used by a local business. Norfolk Southern's tracks are just out of sight on the left of the photo. McDonough, the county seat of Henry County, is a city of 10,000 located about 30 miles south of Atlanta.   Georgia's Railroad History & Heritage. Copyright, Steve Storey. Railroad History | The Depot List | Locomotives On Display | Odds & Ends | Sources & References | Home