The other day, I found a little worldbuilding resource in a very unexpected place: the What If? section of the website XKCD, best known for ridiculously clever comics featuring surprisingly expressive featureless stick people. If you're building a fantasy world from the ground up, and you wonder something like, "What parts of this continent would have what kind of climate?", then have a goggle at this little wonder. Rock on, XKCD.