East Coast

The East Coast, also known as the "Eastern Seaboard" or "Atlantic Seaboard," refers to the easternmost coastal states of the pre-War United States, which touch the Atlantic Ocean and stretch up to what used to be Canada. While in a strict geographical sense it includes the entire eastern seaboard, in popular usage the term "East Coast" is most often used to specifically refer to the northern half of this region, which is also known as the Northeastern U.S.

Capital Wasteland
The Capital Wasteland is a large expanse of open areas with caves, Raider camps, etc. in the area of the former Washington, DC around the more urban areas of Downtown DC. As of 2277, the area is overrun by Super Mutants who are in a constant battle to push humans out.

The central hub of civilization in the ruins of the former capital is Rivet City, based in and around the remains of a beached aircraft carrier. Other settlements include the towns of Megaton, Springvale, Andale, Tenpenny Towers and Paradise Falls, as well as the Brotherhood of Steel Citadel built in place of the pre-War Pentagon. Movement between the certain areas is possible through the Washington Metro tunnels.

Adams Air Force Base
Adams Air Force Base was once a major military installation of the United States in pre-War times. Located just outside the Capital Wasteland, the base is accessible through the Presidential Metro, and in 2277 served as a secondary headquarters for the Enclave, besides their original facility at Raven Rock. Enclave operations were centered in the Enclave Mobile Base, which had the capability to call down orbital strikes on several locations in the Capital Wasteland.

Commonwealth
The Commonwealth is what is left of the pre-War state of Massachusetts. While it too was ravaged by the Great War and is as lawless and inhospitable as much of the former United States, its main attraction is the mysterious Institute. The Institute itself has developed highly advanced technology and even artificial intelligence, which it has used to create a population of subservient androids. An opposing organization in the Commonwealth, the Railroad, works to eventually free the enslaved androids from their creators.

Point Look
An unknown region that may possibly exist in the area of Point Lookout, Maryland, just north of the Capital Wasteland. The region has not been mentioned anywhere in Fallout 3 or its three current DLC packs, but will apparently be included in an as yet unconfirmed fourth DLC pack.

Erie Stretch
The Erie Stretch is a vague region located somewhere along the Lake Erie coast, or possibly the area of Erie, Pennsylvania. Even less is known about the Erie Stretch than Ronto, except that it was known to the inhabitants of The Pitt in 2277.

The Pitt
The Pitt is a Raider settlement built from the decaying infrastructure of the city of Pittsburgh, Pennsylvania. The settlement is divided into two main areas: Downtown, where slaves work and live, and Uptown, where the raiders live. Downtown includes quarters for the slave population, The Mill, and the abandoned Steelyard which is inhabited by Wildmen and Trogs. Uptown features the Abandoned Apartments and Haven building, the personal palace for The Pitt's leader, Ishmael Ashur. A network of ramps and bridges connects the upper floors of The Pitt's dilapidated buildings in both parts of the settlement, serving as platforms for raiders to oversee the working slaves.

Ronto
Little is known about Ronto, except that it likely consists of the remnants of the Canadian city of Toronto, and by 2277 had established itself as a notable power in the area with a reputation that reached as far as The Pitt.