The ultimate metal loop puzzle

Thanks to all taking interest in my photographic efforts and for the stars and occasional, prized heart!!  Off again tomorrow on another short break.  On last one (Somerset) I thought I'd have time to blip, but just too many distractions.  This time in Cornwall & Devon for longer, so hopefully more time!  Heading for The Lizard and then working back via north Cornwall, down to Bovey Castle and home.