Photograph showing unidentified people and the tunnel opening to South Apse at Cosanti in Paradise Valley, Arizona

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

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

Photograph of unidentified people at Cosanti in Paradise Valley, Arizona

Photograph of entrance to South Apse at Cosanti in Paradise Valley, Arizona

Photograph showing exterior windows of Barrel Vault at Cosanti in Paradise Valley, Arizona

Panorama view of Arcosanti site showing buildings under construction

Photograph of vaults under construction at Arcosanti

Photograph of people working on construction of vaults at Arcosanti

Panorama view of Arcosanti site showing buildings under construction