I do not know if this qualifies as a "secret" or not or if this is already widely known. The last time we were at WDW (Feb 2004) was the first time I had went since 20,000 Leagues was no longer there. I spoke with a cast member about the ride's removal. I remember he said something about most children today are not familiar with the movie this ride was based on. (I also know now after reading about it, the reasons such as the cost of keeping that much water clear enough for viewing the underwater scenes, the ride not being wheelchair accessible, etc.).
As for the information that may not be widely known, the cast member told me about the underground system they have at WDW (of which I was already aware). He told me that a reason for the ride's removal was because the cast member's locker room(s) were located underneath where 20,000 Leagues used to be, and they would often have leaks in the locker rooms.
As for the information that may not be widely known, the cast member told me about the underground system they have at WDW (of which I was already aware). He told me that a reason for the ride's removal was because the cast member's locker room(s) were located underneath where 20,000 Leagues used to be, and they would often have leaks in the locker rooms.