>>46554613it might be possible with priority tiles. I'm not that knowledgeable, but it sounds interesting to try out. The idea was that (if I manage to allow the bridges to let the player surf through underneath them) the cave would be moved a bit further west in the river. The plan right now is to have that river cut through the whole region, so you would be able to surf from the northern coast down to the southern coast.
Unrelated spoiler: this little area is a separate map for a reason.