The Ultima Tower -- a Human Termite Nest

Eugene Tsui has designed a concept city called The Ultima Tower that would help solve the global population crisis. Acting as a human termite nest, and costing $150 billion, these two mile high green towers would house over one million people in a one mile wide area. Instead of floors, the building’s interior would consist of a multi-dimensional ecosystem complete with neighborhood districts and 30-50 meter high skies. Lakes, streams, rivers, hills and ravines comprise the soil landscape on which residential, office, commercial, retail and entertainment buildings can be built.