**Terrain** describes the natural physical features of a province.

  * Climate Modifiers
    * Tropical
    * Subtropical
    * Temperate
    * Boreal
    * Arctic
  * Elevation Modifiers
    * Hills
    * Mountains
  * Biome Modifiers
    * Desert
    * Scrub
    * Steppe
    * Grassland
    * Savannah
    * Woods
    * Forest
    * Marsh
    * Swamp
  * Other Modifiers
    * Glacier