What lives in a case like this?
I think that most of you who commented were on the right lines when you answered "harp guitar", although I'm not sure if this Espana classical is technically a harp guitar as it doesn't have any extra strings.
I can only assume that the elongated body "wing" is there to give increased bass response.
However, it's not as wild as this example which we looked at on this blog last June. Can you imagine what the case would have looked like for that guitar?