The entrance/exit to/from the roof of the east tower.
View out the stairwell window while descending
The ceiling of the room below the top of the tower.
Since they do charge, they should clean their 'view' windows regularly. To not do so is to not honor the tourists who have come to appreciate your cultural heritage.
Wow, what a dirty window ruining the view!
Staff member said not to open the window, one gets this 'marred' shot...