The main room of the diner consists of booths laid out against the south and east walls, as well as a jukebox and a counter. Behind the counter is a toolbox with a novice lock, along with a door to the "employees only" section of the diner.
Behind the "employees only" door is the diner's kitchen, which contains various small foodstuffs and cooking-related junk items. A first aid box is on the wall immediately to the left, and another door on the left leads to a storage area.
Northwest of the diner, there is a broken stairwell next to a flaming barrel leading to the lower level of a collapsed building. Inside, there is a mirelurk and a half dozen hatchlings.
Southwest, between the diner and Fraternal Post 115 is a ruined school with a big clock at the front. A random encounter will always occur at this place.
The Cambridge campus diner appears only in Fallout 4.
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