1 – East Boston Police Station - Ruined police station, in which is nothing interesting. Let's search the warehouse against the police station, you can find there some ammo and food.
2 – East Boston Preparatory School - Four-storey bulding controlled by raiders. You will find many Vault lunch boxes, a lot of ammo, food, 8 fusion cores and Astoundingly Awesome Tales magazine here. You can free several imprisoned people on fourth level.
3 – Easy City Downs - Big area controlled by bandits. You can find here many valuable crafting items and Tumblers Today magazine.
4 – Boston Airport - It is main place of the Brotherhood of Steel's forces in Commonwealth, when they arrive. You can find some vualable items here and complete several quests. There is also a small area for you settlement.
5 – Boston Airport Ruins - Extensive ruins occupied by big group of ghouls. It is at the back of the Boston Airport location. Exploration of its is connected with Brotherhood of Steel side quest - "Duty or dishonored"
6 – The Prydwen - Borhterhood of Steel's ship and headquarter. You can find several traders and workshops, take many side quests and start most of the Brotherhood's main quests here.
7 – Nordhagen Beach - Small farm, which can be your settlement after completing one random quest.
8 – Fort Strong - Fort Strong is controlled by super mutants. Elimination of them is connected with one of the Brotherhood of Steel's quest. In the armory you will find U.S. Covert Operations Manual.
9 – Four Leaf Fishpacking Plant - This place is controlled by ghouls. You will find 2 fusion cores, minigun and Tales of a Junktown Jerky Vendor magazine here. At the roof of the building is a secret room, which you can unlock by solving a simple puzzle.
10 – General Atomics Factory - You will meet 10-15 hostile robots. By solving simple puzzle you can get 3 fusion cores. In the building you can also find a lot of ammo, medicines, crafting stuff and Tesla Science magazine.
11 – Gwinnett Brewery - To get inside you need to unlock door (expert level) or hack the terminal (advanced level). You will meet many mirelurks. There is pipe that connect brewery with Gwinnett Restaurant. In the control room you can find Tales of a Junktown Jerky Vendor magazine.
12 – South Boston Police Department - You will meet only two mongrels inside. You can open the cellar by lockpicking or hacking the terminal (expert level in both cases). There is also a safe (expert level) on the first floor of the building.
13 – Andrew Station - The Station is occupied by group of 20-30 raiders. You can find here the entrance to metro's tunnels, which are really long and you can find many valuable items here.
14 – The Gwinnett Restaurant - The Restaurant is connected by a pipe with Gwinnett Brewery. You will meet a group of super mutants and find much food and beer inside.
15 – The Castle - The Castle, after cleansing it from enemies (many mirelurks and one mireluks' queen), can be your settlement. You will find Guns & Bullets magazine, flame thrower, rocket launcher and more here. This place is connected with several Minutemen's quests.
16 – South Boston High School - Small raiders encampment. In the building, and outside, you can find few interesting items.
17 – Spectacle Island - The Island is occupied by mirelurks (one mireluks' queen). It can be your settlement and can find here Luck Bobblehead for example.