One of the most significant parts for me in all of The Voyage of the Dawn Treader is when Eustace changes to a dragon. In the 2008 theatrical version of the story, this was the highlight of the whole film for me, when Reepicheep the mouse ends up being a comfort to him. Yes, I did tear up. There’s so much internal meaning to this subplot, but I will just show you the image I found on DeviantART that portrays that scene so well.
Image created by Slazerbeam