Hello!
I was playing in Pumpkin Pastures and then I noticed the Islands on the Map, I thought there was an hidden Chest. (See picture 1)

I jumped on the boat (See picture 2) like this, (Look linked video) and then I got stuck (see picture 3)

And then, I jumped on the Island but I realised that there was nothing there, and that we have no purpose to go there. (See Picture 4, 5, 6 & 7)

Thanks for correction!