Head over to the Ruins of Sanctity. You may face enemies that are stronger than any you've ever faced before, so be careful. Let me know if you find anything.
Area 1 Path 1 has one. Break the stone jamming the water wheel, then ride it to the top to find the hidden niche.
Area 2 Path 1 has one. It is on the ledge at top of the ascending stairs, just after the semi-circular hallway on the South edge of map. 2 wisps will spawn as you approach.