The internet is big. We can only really imagine what it looks like. The only physical, visually describable parts are the interconnected computers, miles of wires and satellites, but those images look nothing like what we connect to through a browser. That looks more like a universe, conceptually.
Imagine a universe of dots afloat with lines connecting them. Not every dot connects to every dot. And connecting lines only appear when someone clicks a link, activating that connection. Nothing happens online until somebody clicks a link or visits a site.