In the Enterprise-D simulation Stage Nine, the corridor from the Enterprise's bridge to its observation room (the one oft used as a situation room or briefing room) loops around, with the door to the observation room in the middle, and has stairs down to the observation room and another exit afterward. My mother, watching, protested, saying there are no stairs on the Enterprise.
That's another question entirely, but it did pique my interest, so I did more research. The Whitefire blueprints indicate a hall without stairs, with the entry to the observation room at the end of the hall. Memory Alpha also states that the observation room was connected through a "short, ramped corridor."
So, was this corridor ever depicted in official or even mildly canon sources, outside of the blueprints? And are there stairs there, anyway?