How do I get Outlook to subscribe to an iCloud calendar?

I've turned the paradigm on its head. Usually people want iCloud to subscribe to (or more usually, sync with) their Outlook calendar. I, instead, wish to have Outlook subscribe to an iCloud calendar. Does anyone out there know how to do this easily? I would have thought it was easy, but Google searches continue to turn up answers involving sync, which I am not trying to do. No, I'm merely trying to subscribe. Any ideas out there? Seems like a simple enough question. (And the PC in question running Outlook does not have any Apple software on it, so I'm syncing my iPad and iPhone to a different PC, not running Outlook).