Reuse maps from your travels as wall art. Apply wallpaper paste to the backs with a china-bristle brush, position on the wall, and smooth the surface to remove air bubbles. When dry, apply a sealer.
Roman Pro 880 Ultra Clear Adhesive, about $15 per gallon, homedepot.com
, and Aqua Zar water-based polyurethane, about $20 per quart; amazon.com