The Door to Nowhere

Another discovery of Lucretia, Oliver and River while they were exploring the abandoned tower. Located on the tower's third floor, this strange door is built directly into the tower's outer wall-- it is visible from the outside, and seems to have been built into the tower's original foundation (meaning it was not affected by the Realignment, as other parts of the tower were). It seems to be a normal door other than its strange placement; its only distinctive feature is its doorknob, which is jet black. It was locked when Lucretia tried to open it.