Keep it Closed
Imagine going to the basement at work and finding this bright red door with the instructions “Keep closed at all times.” If we know one thing about human psychology, it’s that most of us will do exactly what we’re told not to do.
Could it be the gateway to hell? Maybe the portal to the “Upside Down” from Stranger Things is on the other end. It could also just be the elevator door for maintenance but we like the other two theories better. We don’t know if anyone had the guts to open it but t’s no wonder people are wary of basements in general.