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In Megaton the key is in a key box mounted on the wall to the right of the door and requires the Player House Key to open.At Beth Ruins and Vault 101 it's in a rock Hide A Key to the right of the door. A seperate container key can be found laying o Several awesome hangouts in Megaton, Beth Ruins, and Vault 101 filled with all the gear and space anyone would need after long treks in the Wasteland.There is a workbench, hot water, items storage, and more.