You will see it but you won’t know it. This is the room which is hidden in your plain sight.
Alright. Hidden room is a secret rest area for the crew. It is generally located on wide body aircrafts. In Boeing, it is located in the nose section. This will look like a small cupboard to passengers but may have stairs hidden behind it.
These rooms may contain 5 or 6 bunk beds and basic amenities. Crew may need rest during long hauls.
They are humans too. Ain’t they?