A Russian architectural firm called Ab Ellis has unveiled its proposal to turn an old diamond mine in Siberia into a huge domed city that stretches 1,700 feet below ground. Eco-City 2020 could house 100,000 people and be powered by solar cells on the city roof. At the link, you can view several more architectural concept images, as well as photographs of this site, which is the second largest hole in the world.
Link via DVICE | Photo: Ab Ellis