There are 13 Explore cards that will allow players to choose which Terrain in which Shape to draw on their Map Sheets.
Explore Cards might have a choice between Terrain or Shapes OR be a special card - Rift Land or Ruins.
Rift Lands allows players to fill in a single square in with any Terrain type.
Ruins forces players to draw the next available Shape on the next Explore card for it to overlap a Ruins space on their Map.