Produced by: Phillip Zibilich
Website: The Ultima Dragons on Facebook
Phillip Zibilich has created a massive map of what he calls Sosaria — Britannia, basically — in Minecraft. It is based on the heightmap of the continent from Ultima Online, with a few corrections here and there to adjust for the limitations of the Minecraft engine.
It has been tested with the latest version of Minecraft, and also works with some modded versions of the game.