Hidden diner

The hidden diner is an unmarked location in the Commonwealth in 2287 in Fallout 4.

Layout
The diner has several windows, doubling as the entrance, face away from Diamond City. Next to some of the windows is several shipping crates and a power armor station. Alongside the wall facing Diamond City is some buffet counters and minor loot. The wall facing the entrance to Diamond City has a bed and a dead settler.

The hidden diner can be reached easily with a power armor jet-pack or by climbing up scaffolding in the junkyard to reach to the 2nd tallest floor of the apartments. Then, jump to a neighboring rooftop with skylights to clip to a secret ledge. Finally, walk alongside the ledge to get atop the wall. From there, you can either head left, which will take you to the Diamond City gate and past a skeleton and a duffel bag with random loot. If you head right, you get to the diner. Then head in the windows.

Appearances
The hidden diner appears only in Fallout 4.