Philadelphia

Philadelphia (colloquially called Philly) was a pre-War city in the United States.

Background
The city was affected by nuclear weapons, but one piece of American history still stands there, the Liberty Bell. Philadelphia is mentioned in Abraham Washington's terminal. It states that he ran into a traveler from there, and that he has funded an expedition to retrieve the Liberty Bell.

Appearances
Philadelphia is only mentioned in Fallout 3 and Fallout 4.