I like Finnian MacManus' reimagination of the worlds of Dune, the 1965 book by Frank Herbert. Above you can see the main palace in Harakkeen—a renamed city of Arrakeen in an alternative ending where House Atreides loses the war against House Harkonnen. The rest of his work is quite cool too.
Finnian MacManus is a freelance concept artist and designer living in Pasadena, California. He specializes in 2D environment design, along with 3D concepts.