DM Help Desperately need help looking for a dungeon/adventure/module

I genuinely feel like I'm going insane. I'm looking for a specific adventure/module I saw a few months back which I I'm pretty sure was not for 5e, but rather made for an older edition of dnd. The module had 1 or two towers which could rearrange themselves, and in an area inaccessible due to the current arrangement of the tower when the players arrived, there was a king or some other leader working on making/preparing something. I think it was officially published module for an older edition, but I could be wrong. Any help would be greatly appreciated so I can prove to myself I'm not going insane and because I need it tonight by 6 pst, lest there be dire consequences for my health.