This is how the hallway used to look! It's difficult to capture, but there's a full bank of windows at the end of the hallway.
They removed two windows and added panels to eventually allow for some giant pipes from the Infinite to go out of the window and to the construction site.
The two story building on the far left is the one they're demolishing to make room for a new Nanomaterials Building.
There's official doors and everything. Madness.