| Civilization | Tile improvement | Base effect | % Correct |
|---|---|---|---|
| France | Chateau | +1 Gold, +2 Culture, 50% Defense | 95%
|
| Polynesia | Moai | +1 Culture, +1 Culture for adjacent same improvement | 90%
|
| Netherlands | Polder | +3 Food | 90%
|
| Brazil | Brazilwood Camp | +2 Gold | 80%
|
| Inca | Terrace Farm | +1 Food, +1 Food for each adjacent mountain | 80%
|
| Morocco | Kasbah | +1 Food, +1 Production, +1 Gold, 50% Defense | 50%
|
| Portugal | Feitoria | 1 copy of each City State luxury, 50% Defense | 40%
|