I've seen several variations of these hanging corner shelves available, including ones with inbuilt picture frames. I think the panelled parts against the wall make it more of a feature so it's a nice solution for a small empty corner. It's also an idea that you could easily DIY.
Harvest leaves add easy color to a Thanksgiving table. More fall centerpiece ideas: http://www.bhg.com/thanksgiving/indoor-decorating/centerpiece-and-tabletop-decoration-ideas-fall/?socsrc=bhgpin110512fallbranches