My landmark is a laundry building in Lethbridge and I made by POV-RAY.
Actually, it is not difficult, but it need much time to do this. The picture is made by a lot of boxes. The most difficult part is finding the coordinate, for example, sometime I think the box should be here, actually it is not here. And the other tough part is the light and camera, if the light is not in the correct position, the color of the object will be changed. The POV-RAY is a powerful tool for creating the 3D pictures, but I do not have much time to learn it deeply, In all, this picture is not ideal, but it is the best i can do for now.