The Cambridge construction site is an unmarked location in the Commonwealth.
The construction site rests directly in the middle of the BADTFL regional office, Bunker Hill, and Monsignor Plaza, along the main highway. The multi-storied project is now a ruined maze of collapsed stairwells and floors with a currently flooded basement. Stairs on the ground floor lead up to second floor, containing nothing of note, and continues up to the third floor.
The stairs are blocked after that, forcing one to scale the collapsed floor to the fourth story, which has a weapons workbench and another collapsed floor leading up to the fifth story. Collapsed floors on the northwestern wall and southern corner lead up to the sixth floor, which allows access to the stairs again and takes one to the seventh story, where a scrap metal bridge connects the building to the adjacent overpass highway to the northeast. The stairs also lead to eighth and final story, where a campfire burns
The Cambridge construction site appears only in Fallout 4.