Within the mission editor there are a variety of locations in which you can create a mission. Each location has a unique tileset of its own, although you may find some tiles common to other locations. Different locations also have their own characters which you can place within your creation. Being familiar with the variety of tiles in each location can help you build both attractive and playable missions.
There are 12 different locations and the tiles associated with each can be shown by clicking on the appropriate location above or below.