Quoted By:
Terrains
Plains:
>Uncontrolled tile costs 1 gold.
Mountains:
>Uncontrolled tile costs 3 gold.
>Buildings cost extra 2 gold to construct.
Desert:
>Uncontrolled tile costs 2 gold.
>Settlements consume 1 additional food each turn.
Forest:
>Uncontrolled tile costs 2 gold.
>Forts cost 1 gold less to build and upgrade.
>Can be turned into a plains which gives 1 gold if controlled.
Sea:
>Cannot be annexed.
>Units cost 1 additional gold each turn while at sea.
>Units can move an additional 3 tiles while at sea.