|Fortified Cave With Cache|
This tile gets some defensive bonuses like:
- +90% air defense.
- +25% tile defense.
- City Garrison upgrade has effect in this tile.
- +1 visibility height.
This building can be bombarded by an enemy unit, lowering its defensive bonus.
Build this improvement on strategic tiles outside a city's economic range; for example to block the movement of (future) enemy units into a certain territory, or on resources as it will eventually become a fort and then will provide this resource to your connected cities.