I really like this Secret Garden idea
http://www.notjustahousewife.net/2012/08/trellis-from-my-secret-garden.html using swirly wood as a trellis. I have a very un-square corner where 2 different fences meet and I've been stuck not knowing what to do with it. Trellis for pretty things to grow up on is definitely my favorite option, but the square trellis designs only show how un-square the corner really is. But the linked idea shows a great way to hide an unattractive corner, so I'm sharing and saving this one for my 'future ideas'!