We are naturally surface dwelling creatures, we exist in our open air world with the earth's atmosphere surrounding us and space as our ceiling. But there is a world which is rarely given much thought, almost always out of sight and, by many, unexplored. This is the subterranean world beneath our feet: caves, caverns, mines, sewers, tunnels, basements, crevasses, bunkers... these are just a few of the things you should consider in this brief. Let's see how you can portray the world which is subterranean, but let's make it interesting - NO subway or tube stations, lets make the unseen visible. Good luck.
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