I grew up in Clearwater so Circus World was one of our "places to go", we usually did WDW, but every so often you needed a change. When it was replaced by Boardwalk and Baseball I went there on a school trip so I have fond memories of both parks. When Boardwalk and Baseball closed the Kansas City Royals stayed there using the stadium as their Spring Training venue for a few years. Once they left it just sat for what seemed to be forever. It has now been cleared and is being built into a "POSH" housing development. Posner Park is being built in that area which is supposed to be a planned living community (one of those you can live/work/etc all in the same place).
http://www.kitsonpartners.com/commercial/posner_center.htm
We now live about 6 minutes from there, so while it has been sad to see the parks come and go, it is nice to see the area being built up...FINALLY.