Libra key
The key is hidden in the ruins on the left side of the land, after you have built the stone bridge to cross the river. Across the river is one set of ruins, then to the left and south of that is a large briar patch that needs to be removed. Once that is done, cut down the large dead tree to get across the chasm to the last area. The ruins of the observatory are in this area. After your workers clear that area, the Libra Key will appear.
Zodiacs
The twelve Zodiacs can be found at the following locations.
In the swamp after you complete the bridge.
In the swamp in the well.
In the swamp behind the chatty spider.
In the bush in the Fuzzle field.
On the raft after you rebuild it.
On the other side of the stone bridge at the first ruins).
On the other side of the stone bridge at the observatory ruins).
On the side of the cliff by the observatory.
From the old man in the ice.
From the large face statue to the left of the old man's cave.
In the tree protected by the bees.
In the pond that you get from the big fish.
