Spoilers:you enter cabin in the woods, there is 3 doors... two on the right and one straight ahead.
if you always aim to go for the one straight ahead as it is , that does a u-turn and takes you back out another hidden door into the first room. then pick either of the other two; for the purpose of the example ill say pick the left one, then once inside the next room, there is a hidden door on the left, go through that to the basement, then you exit on the right, into another room, and then from there keep looking on the left hand side for a hidden door, this is the dead end where the basement room is (it can be accessed going the other ways, just the one described is the easiest to find it)
CONTROL ROOM