[Help/Advice Needed] Suggestions on what to convert this to?

I just bought a house and need help on what to do with this random structure in the side of my backyard? There is even a 6x6 space of grass behind it that is just wasted. Has anyone ever see this structure or have any ideas what to do with it? Only thing I can think of is a greenhouse? Imgur

Submitted April 30, 2015 at 09:49PM by djsteveoh http://ift.tt/1JURW8F