It was also Edgar Allan Poe's home town. The First Doctor, Ian Chesterton and Barbara Wright once encountered Poe there, near the end of his life, (PROSE: The True and Indisputable Facts in the Matter of the Ram's Skull) as did the Seventh Doctor and Ace (PROSE: The Algebra of Ice) and the Eighth Doctor (AUDIO: Nevermore)
Some of its known inhabitants, aside from Peri, were her mother Janine Foster, her late father Paul Brown, Anthony, Kathy and Nathaniel Chambers, Daniel Woods, Lt. Doyle, and Natalie Hamilton. (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 Baltimore.