Recently followed a link to a fic called "Under the Northern Lights" by CoastalSarv, in Which Luna, accompanied by Twilight and Spike, goes north on a diplomatic mission to the Raindeer Kingdom. near the end of the story, it currently has 54 decent sized chapters (average 3500 words) and some impressive world building. There's also the amusing fact that most of the Raindeer have an unflattering impression of Twilight due to their cultural beliefs combined by what they've heard of her.
http://www.fimfiction.net/story/877/und ... ern-lights
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"I've always wanted to be somebody, but I should have been more specific." - George Carlin
http://www.fimfiction.net/story/877/und ... ern-lights
___________________________
"I've always wanted to be somebody, but I should have been more specific." - George Carlin