City life. Underwater city by Andrey Koval, via Behance
city of future
Wang Canazei - http://plasticaddiction.tumblr.com/post/33519059007/theartofanimation-wang-canazei
Astro Boy kicked butt!
The Temple to Wind and Flowers in the City of London
'To the Other Planets' - a Czech book for children about space travel 1962. Illustrations by Frantisek Skoda
The Art Of Animation, Mathieu Leyssenne
... living underwater by x-ray delta one, via Flickr