Last week, I built a house in Minecraft. I was proud of my house. It felt like an achievement to finally finish building it. Then I had a look at what some other people had built in the same game, and suddenly I didnt feel very proud anymore. As it happens, there is a whole bunch of people who are apparently unrecognised geniuses, who can build things mere mortals like myself couldnt even imagine in their wildest dreams. Its difficult to be satisfied with a single house and farm when theres teams of scores of people from around the world building the entire country of Denmark, or a scale model of Minas Tirith. Whilst the builds which are tributes to famous places from fiction or real life landmarks, for my money even more impressive are those creations which *do* something things you can interact with or use, which require a wholly different kind of know-how and skill to be able to build. Here are some of the most mind-boggling machines ever created within the game world and good luck if you want to replicate them.