Project Indigo - A Vertical Metropolis In The Abyss

Have you ever seen the movie Waterworld? Basically the movie is set in a time when the world is underwater and dry land is more precious then anything - even the ring.
Jesse van Dijk is a great concept artist that have been doing some pretty awesome works, mostly design of world for entertainment industry, and one of those works is his personal project Indigo. The work features a context resembling Waterworld, but he focus on the engineering of a vertical city inside an inactive volcano.