Back to the Tile improvements in Civ4
Whaling Boats are a tile improvement that can be built upon the discovery of Optics. They improve sources of Whales 
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| Civilization IV Improvements [edit] |
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| Camp • Cottage (Hamlet • Village • Town) • Farm • Fishing Boats • Forest PreserveB • Fort • Lumbermill • Mine • Offshore Platform • Pasture • Plantation • Quarry • Roads and railroads • Watermill • Well • Whaling Boats • Windmill • Winery • Workshop |
| B Added in Beyond the Sword |