Jamaica Plain

Jamaica Plain is a settlement in the Commonwealth in Fallout 4.

Layout
The actual buildable area of Jamaica Plain is a small portion of the overall ruined town. There is no deep water, so simple water pumps must suffice. There are lots of sight line breaks and natural walls which combined with the smallish area should prove easily defensible with some choice turret locations.

Getting into the town may prove difficult, as there are some two dozen or more feral ghouls around the area. Salvage is rather sparse compared to other sites, but its location as one of the few southeastern settlements make it a good location for a Minutemen artillery piece.

There is an old church in the center of the plain which has its doors chained. You can access it by entering the house standing next to it and climbing on the roof. There is a platform which leads you straight to the hole in churches roof. You can use the bell tower as a good vantage point to snipe the remaining ghouls. Inside of the church you can find a safe with a Stimpak and two Mentats. There is a dead body near the entrance, that has the Mayor's ID Card which can be used to disable the laser tripwires in the town hall basement.

The most notable place of Jamaica Plain is its town hall. The basement used to be a Janitor's area but it was changed into a pre-war cache, 2 months before the Great War. There are two ways to approach said cache. The left one is simple and requires you to walk through a gas-filled corridor. The right one is the original entrance covered by dozens of laser tripwires linked to turrets.

The laser tripwires can be rearmed by closing the final door using a nearby button and then salvaged again for high amounts of steel and fiber optics. Please note that your companions are very likely to enter the area and trigger the tripwires resulting in almost immediate death.

The Jamaica Plain Treasure, is located in the basement.

There are 5 bodies belonging to the crew that attempted to find the Treasure of Jamaica Plain.

Sal - Ex-gunner, Heavy weapons specialist, Leader of the group - Found in Mayor's office.

Luke Silverhand - Gearhead - Tech guy - Found in the church

Carl Everett - Fixer - Found near some cars.

Ken Standish - Found on the second floor of a building close to the Mayor's office.

Tanya Standish - with Ken.

There are several unique junk items in the cache, with the exception of a legendary 2076 World Series baseball bat and two Holotapes.

Notable loot
There are 49 steel, crystal, and fiber optics if you disarm all of the laser trips just prior to the room with the two protecterons.
 * Holotape instructions, a paper note on a table next to a terminal in the Treasures exhibit in the Jamaica Plain town hall's basement.
 * Two holotapes, The Treasures of Jamaica Plain and Treasures inventory, on the same table.
 * 2076 World Series baseball bat, in a display case on the north side of the room in the Treasures exhibit.
 * Sal's holotape and Jamaica Plain mayor's password, on the body of Sal in the upstairs area of the ruined town hall building.

Appearances
Jamaica Plain only appears in Fallout 4.