Regarding the Matterhorn, the original design was much more open. There was a huge opening for the Skyway to pass through and you could actually see out as you went up the lift hill. That all changed when they added the Abominable Snowman. They closed up the holes so the Snowman could hide in dark corners. I liked the original open design much more. (You can read more here http://www.yesterland.com/oldmatterhorn.html)
Regarding the Red Monorail picture, I'm assuming it was taken from the Skyway as it was passing over Fantasyland. It's an amazing shot. There's nothing but trees and dirt out there! I'm sure the horizon in that picture today would be full of strip hotels.
Great article BTW!