The building comes with the special set bonus. It produces happiness when not connected to any other buildings of the set, and additional defense boost and attack boost when connected to other Classical Garden Set buildings.
It requires a road connection.
For more information see the Set Bonuses.
The Classical Garden Pool comes with the special set bonus. When it is adjacent to other buildings belonging to the Classical Garden Set the properties of the building are improved.
The Classical Garden Pool will provide the following boosts. Base happiness will always be produced. Bonus stats are determined by how many other unique Classical Garden Set buildings it is connected to. Despite the road requirement, bonus effects are applied regardless of road connection and state of the building, even when in unconstructed form.