Caves Terrain is a special, but unmarked terrain in Bloons Monkey City (similar to Volcano Terrain). There are five cave terrain tiles on every map and it is believed this could be linked to a Portal Artifact. Gameplay is the same as normal. This type of terrain favors Ice Monkeys but restricts Monkey Aces, Banana Farms, Dartling Guns and Heli Pilots, unless when played in Replay Tracks on Flash. On Flash's Replay Tracks, Monkey Engineers are favored while Monkey Aces and Mortar Monkeys are restricted.


Inside the Caves Terrain is part of the interior of a cave. Bloons enter from the bottom paths and the one top-left path, circle counterclockwise around the center and exit at the top-right corner, outside of the cave. The center space makes good use for towers with short range and area damage, such as Tack Shooters and Ice Monkeys. The single exit makes it suitable for a Spike Factory.


  • Placing a Spike Factory near the exit may help pop those bloons that break through your defenses.


Main article: Caves Terrain/Strategies


Upon completion, cave terrain tiles reward the player with City Cash and bloonstones. The amount of City Cash and Bloonstones given depends on the tile difficulty. This can range from BloonstoneIcon7 to BloonstoneIcon15 and approx. City cash700 to approx. City cash2500.


Caves marked as Mountains Terrain

Caves Terrain being marked as "Mountains Terrain"

  • Cave terrain tiles show up as mountain terrain tiles on the game map.
    • However, in the Maps & Towers menu, they are labelled as Caves Terrain.
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