Curse of the Sea Rats

In general, all items are found quite simply and in the course of the plot, if you go for platinum, then in any case you will complete all the quests (for some you will receive treasures) and also open the entire map. But I want to draw attention to the most difficult item that is easy to miss (it is marked on the map), and the most interesting thing is that this area does not have to be opened for the trophy to open the entire map and this can be misleading, I got the trophy without it! I also want to note that you need to get to this area by jumping over the cliff and jumping to the left onto a small, inconspicuous leafy island.