Photograph showing 1949 construction of earth-formed dome house in Cave Creek, Arizona designed by Paolo Soleri

Photograph of kitchen floor during construction of dome house in Cave Creek, Arizona designed by Paolo Soleri

Interior photograph of dome house in Cave Creek, Arizona, designed by Paolo Soleri, showing Paolo Soleri and Colly Soleri

Interior photograph of dome house in Cave Creek, Arizona, designed by Paolo Soleri, showing Paolo Soleri and Colly Soleri

Exterior photograph of dome house in Cave Creek, Arizona designed by Paolo Soleri

Photograph of a dome structure at Cosanti in Paradise Valley, Arizona

Photograph of dome structures at Cosanti in Paradise Valley, Arizona

Photograph of a dome structure at Cosanti in Paradise Valley, Arizona

Photograph of a dome structure at Construction Camp, Arcosanti