As she opens it, a breath of fresh air, warm and pleasant, wafts out at her. She can step through into a stone corridor. The walls, floor and ceiling are all made up of the same even grey blocks. Torches in brackets line the walls at regular intervals. Nevertheless, the atmosphere feels inviting, the air clean and easy to breathe, not smoky at all. It's clearly the first floor of the dungeon... if a little friendlier and more idealized than it truly is in life.