Design firms, Art Directors, and students continually create "Proof of Concept" ideas, visual explorations that allow them to flex, and to hopefully get some money to create their dream projects. Lev Britvin is a Russian academic that conceptualized Ark—an apocalypse-proof 2-mile tube shelter. It is built to generate wind, pump heat, and transfer thermal energy into electricity, and can either float on water or be built into land. If it all goes down, we'll be with Lev. Click the thumbnails to see the different iterations of the concept, and hit the links for more info. [Design You Trust via Remi Studio]