The Pointed Tops

Have you ever noticed temples, historical buildings and towers have a dome-shaped or a pointed top? Why is it so? If seen from space, and the tips joined by a narrow beam of light, it would definitely create a link with each other. This isn't intentionally made for this purpose but it is misused by aliens. As pointed by #AncientAliens in their episode, this is a network used by aliens to know about the current status of Earth.