I reloaded the WDW Explorer on my computer a few days ago, had not looked at it in a couple of years. The most interesting feature I think is the timeline. It's amazing how much has been built since the Magic Kingdom opened and since we first went 20 years ago. Twenty years ago you were told you needed to book at least six months if not more in advance to make sure you got a room at the two resorts, Poly and Comtemp.
Phrank