Between Two Cities: Capitals expands the base game by adding several new challenges: landscapes, districts, and civic building tiles. This is not a standalone expansion; you need the original Between Two Cities game to play.
In more detail:
• Landscape mats give each city a unique layout to build on and around.
• Districts give players a majority bonus for connecting specific types of tiles.
• Civic building tiles are a new type of building tile; each unique civic building wants to be adjacent to two specific tile types (and not one specific tile type).