Long before the big expansion at Walt Disney World, the days of Disney-MGM Studios and Typhoon Lagoon, there was a gem of a little watering hole called River Country. By today's standards, it was a fairly simple place to hang out: rope swings, pools, a couple of water slides. Certainly nothing incredible, but it was a nice afternoon diversion for those folks staying at Fort Wilderness or those smart enough to leave the Magic Kingdom or Epcot for a break. Look at the concept art from some unknown Imagineer. Makes a pretty enticing argument for bringing it back.
(Art copyright The Walt Disney Company.)