The investigator's cabin is a location in the Savage Divide region of Appalachia.
An investigator from the BADTFL by the name of Curtis Wilson used to stay in the cabin at this location. He was sent to Appalachia to investigate the Free States movement.
This location consists of a small mountain cabin in the woods of the Savage Divide.
Investigative report - Note, inside the cabin next to the terminal.
The investigator's cabin appears only in Fallout 76.