Wall A cheap method to prevent enemies entering an area. Each segment costs 5 wood, and portions can be turned into a gate for 50 wood.
Trading Post Can only be built on a native settlement or trade route. If built on a settlement, you can train native warriors and acsess their improvements. If built on a trade route, it will routeinly give exp. and when upgraded, resources.
Fire Pit Built only by native civilizations, tasking villagers to dance will give a benefit of your choice.