Its ok, kwt10. Thanks for all the info, though!
To answer your questions,
THE WATERFALL and the Dragons Cave are (were?) off to the right hand side of the bridge going from Discovery Island to Camp Minnie Mickey. The last time I was there, which was quite awhile ago, the cave is still there and the waterfall was. That was when I took the picture.
Guests had no access to the cave and waterfall, but they could be seen from the bridge and were part of the Discovery River Boats/Water Taxis/Radio Disney Cruise before they were junked (the cruise, that is).
Good points by all. Its true that Disney did not mean to cut Beastly Kingdom but the cost of backstage facilities upped the bill farther than the $800 mill budget. But the money I heard that was marked for it afterward quickly went out to other things, like attractions for the Millenium celebration etc, so the parks had something new to attract people back to them after AK's meagar attendance bit into the other parks rather than adding on a day to people's vacations.