Mine is in zones also, and also marked by different ground covers.. On the left side of the river,I have the farm area, housing units,and a municipal area with cultural and civic buildings. Running through the middle is outdoor common areas with sports and outdoor fun. On the other other side of the river are the business, manufacturing and entertainment areas. I have a big hands-on living history museum with all the stuff from dinosaurs to pirates. The island at the bottom right is an exclusive resort only accessible by plane or boat. At top of screen is my public camping and recreation area. I wanted lots of green spaces for my townies to enjoy.