Urban Planning, Community Planning, City Planning, New Urbanism, Smart Growth, Zoning, Transportation and all that makes the built environments that we work and recreate in. Urban planning aims to improve the built, natural, social and economic aspects of towns and cities.
For geeks and nerds, artists, writers, philosophers, politicians and scientists alike: The creation of new worlds and new universes has been a key element of science fiction and fantasy. It can also exist outside the realm of scifi-literature and RPG-gaming as a means of exploring possibilities. This subreddit is about sharing your worlds and discussing the many aspects of creating new ones.
A place for visual representations of data: Graphs, charts, maps, etc. DataIsBeautiful is for visualizations that effectively convey information. Aesthetics are an important part of information visualization, but pretty pictures are not the aim of this subreddit.
Wiggly mouse-drawn comics where balls represent different countries. They poke fun at national stereotypes and the "international drama" of their diplomatic relations. Polandball combines history, geography, Engrish, and an inferiority complex.
A place to share content, ask questions and/or talk about Paradox Interactive games and of the company proper. Some franchises of note: Stellaris, Cities: Skylines, Europa Universalis, Crusader Kings, Hearts of Iron, Pillars of Eternity, Victoria and Magicka.