Destroy is an ability unlocked after researching the Construction technology that allows the player to remove any building in their territory for free. When a building is destroyed, the city it's built in will lose the corresponding amount of population. Destroying buildings will decrease your score. Destroying a level 5 temple will subtract 350 points and destroying monuments will decrease your score by 400.
This feature can be used on the very last turn (30) of perfection mode to destroy customs houses in order to make room for other structures (usually to level a city up for a park). Since customs houses do not give population, and they only pay out at the end of the turn, they can be destroyed without any consequences.
- If you destroy monuments, you will not get them back.