Host David Yetman and expert architect Bob Vint travel around Tucson, Arizona, to see how adobe - the perfect desert building material - was used in the past and is still used today. Adobe not only has a remarkable period of longevity, but also has thermal capabilities, making it ideal for the hot dry desert. Yetman and Vint spend time at the San Xavier Mission to watch a restoration crew use new adobe to repair and restore the existing adobe exterior. Near Marana, Yetman visits a commercial brickyard to see how these "desert building blocks" are created from start to finish. They also travel to the Tucson Mountains to observe masons constructing adobe walls and visit a completed adobe home to see the finished results.