Cool Art From Titan Books' AWAKENING: THE ART OF HALO 4!!
The city lives under a fake sky dome in a canyon. Outside is too polluted to be habitable. The giant vertical structure attaching to the cliff contains water and air filter system, generate energy, and also house thousands of civilians.
Oops! My bad....
Canyon City , Tu Bui on ArtStation at https://www.artstation.com/artwork/n1w51
ArtStation - Fly in space, Oshanin Dmitriy
70s sci-fi art: boomerstarkiller67: The Future - art by Shusei...