Inside the Cathedral
The door swings in to the left against the end wall of a long room that opens out to the right. The other side of that wall is, of course, the loo.
The room looks to be some sort of living quarters as, at this end, there are sofas and chairs arranged around an odd round table in the center. It's the first sign that everything isn't made of green glass, but they still can't see to have gotten away from the color green.
There are two curved sofas on either side of the table, in the same shade of green as the glass walls. Between the sofas are two plush chairs, each in green but a different shade. Between each chair and the sofa it's next to is a green glass table, long and narrow with a shelf underneath it. Both chairs and sofas have several throw pillows on them, in various shades of green though none match the green glass.
The center table is large enough for all the furniture to fit around it, and it has a large hole in the center. This hole has green glass and what appears to be iron slats curving down to the bottom center of the table.
At the other end of this long room, there are two sets of three bunk bends, stacked but staggered in such a way that you could step on the lower bed to reach the second and then on to the second to reach the third one on top. There does not appear to be anything that you would call a mattress or bedclothes on the beds, but there are over a dozen pillows on each one.
There is also a green glass chandelier hanging over each half of the room.
The wall opposite the door is end wall to end wall green glass windows that look out onto the moor where you entered the building.
Somewhat oddly, you think, there does not appear to be any personal touches in the place. No paintings on the wall, no vases, no knickknacks, etc.