After discovering that there was a sandbox mode, I've been having tons of fun redesigning maps and prettying up the outer areas of scenarios that looked bland in vanilla. Eventually, it led to me making an updated version of the Iceberg Islands scenario that features all of the ice/snow themed attractions and scenery that originally either wasn't included due to an oversight or simply didn't exist yet when the scenario originally shipped with the game.
I also, added some small quality of life changes in the form of new researches, the addition of one new island within the playable area ,