Wall niches and unusual glass in the windows are hallmarks of the hand-built earth home, as in this cob and wood house in Mayne Island, British Columbia, Canada. The glass also visualizes the space in a reflective manner to pamper the eyes.
Bulletin Board or picture frame, decorated with old wine labels. The best part is the wine corks used for wine glass holders. I'd definitely hollow out the wine corks and glue in a small, wooden dowel through both corks, just for stability.
Hanging lights on branches. Go natural with a fat branch and hang a combination of ornaments and candles attached with wire. Use twine or strong fishing wire to suspend the branch from above. You might want to try hangers so as not to damage your ceiling.