Photograph showing exterior view of Barrel Vault and Pumpkin Apse at Cosanti in Paradise Valley, Arizona

Photograph showing exterior view of Barrel Vault and Pumpkin Apse at Cosanti in Paradise Valley, Arizona

Photograph showing exterior view of and steps leading to Barrel Vault at Cosanti in Paradise Valley, Arizona

Photograph of vaults under construction at Arcosanti

Photograph of people working on construction of vaults at Arcosanti

Photograph of vaults under construction at Arcosanti

Photograph showing a group of people working on construction of vaults at Arcosanti