Volcano Terrain is a type of Terrain in Bloons Monkey City. Tracks that belong in this type favor Mortar Monkeys and Monkey Apprentices but restrict Ice Monkeys, Boomerang Throwers and Monkey Villages. Capturing tiles of this type also earns extra Bloonstones, being equal to the minimum City Cash reward divided by 20. This may range from File:BloonstoneIcon.png10 to at least File:BloonstoneIcon.png40. Volcano tracks are among the hardest in the game, due to their heavy restrictions and lack of land that can be placed on. This is likely why Bloonstones are rewarded upon their completion.