winning.   

Constructed with straw bales around existing 11-ft boulder. Photo by RJ Pennell.

Stylistically akin to California’s historic missions, the Dunham-Kidwell straw-bale residence is built around a large boulder. The boulder’s thermal mass and its surrounding moat in the home’s great room cool and humidify the air in summer and passively heat it in winter. Above the boulder is a central tower with an oversized fan that draws air up and out in summer and re-circulates warm air in the winter months.
found at this sustainable architect site.  here