One of the recent celebration maps had some interesting linework for mountains. It quickly evolved away from that, but the original was still interesting. Being that I only have the one tool at my disposal, I managed to use it to generate something mildly interesting. It's probably not any faster than drawing those things by hand, but my hands wouldn't get nearly as good of a result.

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I don't think that this goes all the way to "Fun", but it does meet the "mildly amusing" label. (I did cheat a little on that teaser image by post-processing in Photoshop)