When I was working at WDW in the MK Auto Plaza, we had a great view of the Swan and Dolphin. My manager told me this neat little tid-bit.
Look at the pic and notice the large black square in the middle of the resort.
There is one in the same place at both the Swan and Dolphin.
This was here because when they were built it was planned for there to be a monorail stop there on the way to D-MGM. But, again due to financial constraints they just filled in the area with rooms.
You can also, if paying close attention, see areas all around the grounds (especially near MK, like when taking the hard right after the Auto Plaza on the way to Fort Wilderness) where the land had been prepped to lay railroad track! But they decided to use the monorail in it's place, or at least I believe that is the reason the train didn't go up.
Just a few little tid-bits for ya.