Fell's Point was a district in the city of Baltimore, Maryland, USA. It was the home town of Peri Brown, who attended high school there with her best friend Katherine Chambers and her brother Nathaniel Chambers. (AUDIO: The Reaping)
Real world location
Though it's possible that a real world location doesn't exist in the same geographic space in the Doctor Who universe, such cases are few and far between. Thus, the map at right is probably a good indicator of the DWU location of Fell's Point.