Mine Ruins

1) The arrows point in the direction the platforms will travel (diagonal arrows = UP or DOWN).
2) The First ring is inside a chest.
3) The second is under the platform, you can pick it up without moving the platform.
4) The third ring is tricky to get, when you reach the third floor, in front of the entrance to the Iron Mill, if you look over the ledge you can see 3 blocks below. Drop down on them to pick up the ring, it is on the left hand side block.

Magic Ring