AliensProject of Sustainable City on Mars Unveiled by Architecture Firm Posted on March 22, 2021 by Administrator The project of a self-sufficient and sustainable city on Mars has been unveiled by an international architecture studio, ABIBOO. The city of Nüwa is envisioned to be on the slope of one of the Martian cliffs located at Tempe Mensa. The place was picked because it’s thought to have access to an abundance of water.