OOC:
I'll assume you just go down the hallway and check things out ...
You cautiously approach each of the doors in turn from the closest to the stairs, to the one farthest away.
Behind the first door is a long, wide room that seems to be entirely empty. Behind the second door, the same thing. Behind the third door, however, is a different story. It is shaped similarly to the other two, however, there is a large irregular whole in the wall, with a lot of rubble strewn round the room.

OOC:
I am assuming you are serially checking out the rooms from the corridor. Do you want to go into any of the rooms and look in more detail? If so, please give me a roll per room you want to check out.