A versatile material, redwood can be left to turn a rustic, silver-tone gray, or finished to take on a glowing tint. A pergola such as this one, which will accompany Humboldt Redwood Company at Dwell on Design, can imbue your backyard space with both stateliness and charm.  Photo 7 of 7 in Beauty and Brains: Building Sustainably With Redwood