This is an entirely player built international rail network spanning a massive sandbox server in Minecraft. 

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Every single line, junction, and color code you see here represents tracks thathavw been engineered by different players and in game nations to solve a massive logistical nightmare. 

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On this server, resources are region locked meaning you cannot grow or mine everything in one place. If a nation in the northern tundra wants cactus or sand to progress, they have to buy it from a southern desert nation.

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Because foot travel is slow and dangerous (we've also removed things like elytras and added in thing like faster horses and rails), the players have to build a global transit system from scratch.

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The coolest part to me is that this alone has helped create actual geopolitics. Factions and nations have built massive border fortresses where these rails cross into their territory to enforce customs, taxes, and even border security. Spy blocks called "snitches" often monitor rails, making it an avoided route of travel for most criminals. 

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It’s so awesome to see our participants becoming something like actual civil engineers and logistics managers just to keep their economies and nations chugging along. 

What happens when you let 6,500+ players run a Minecraft world for months with no admin intervention? They end up building a massive, interconnected global rail network, of course.