Catwalk, Gila National Monument, NM 3348a Hoover Dam Historic Railroad Tunnel Trail 0107a Hoover Dam Historic Railroad Tunnel Trail 0106a Hoover Dam Historic Railroad Tunnel Trail 0117a Hoover Dam Historic Railroad Tunnel Trail 0102a Cathedral Gorge State Park 1301a Ruby Mountains, Lamoille Canyon, Island Lake Trail… Ruby Moutains, Lamoille Canyon 0645a Ruby Mountains, Lamoille Canyon 0638a Hoover Dam Historic Railroad Tunnel Trail (0108) Hoover Dam 1800a Hoover Dam 1803a Hoover Dam Historic Railroad Tunnel Trail 0109a Hoover Dam 1804a Hoover Dam 0111a Hoover Dam 1807a Hoover Dam 1808a Hoover Dam 1809a Hoover Dam 1805a Hoover Dam (1810) Hoover Dam 1811a Hoover Dam 1812a Hoover Dam 1813a Hoover Dam 0113a Hoover Dam 1817a1 Hoover Dam 0112a Hoover Dam 1818 Hoover Dam 1815a1 Hoover Dam 1816a1 Hoover Dam 1819a Hoover Dam Bridge 0167a Hoover Dam Bridge 0164a Hoover Dam Bridge 0162a Hoover Dam Bridge 0166a Hoover Dam 0110a Hoover Dam Bridge 0158a Hoover Dam Bridge (0161) San Diego WPA fire station (3493) San Diego WPA fire station (3494) Parker Dam 3386 Parker Dam 3387 Parker Dam 3390 Parker Dam 3391 Parker Dam 3393 Anthony Lake, OR 0941a Anthony Lake, OR 0940a Hart Mountain, OR 1007a Hart Mountain, OR 1010a Hart Mountain, OR 1020a Hart Mountain, OR 1009a Hart Mountain, OR 1025a Hart Mountain, OR 1019a Lake Owyhee, OR 0747a Lake Owyhee, OR 0751a Lake Owyhee, OR 0750a Lake Owyhee, OR 0753a Lake Owyhee, OR 0748a Lake Owyhee, OR 0756a Lake Owyhee, OR 0749a Lake Owyhee, OR 0764a Lake Owyhee, OR 0752a Malheur NWR, OR 0990a Malheur NWR, OR BLM (0992a) Catwalk, Gila National Monument, NM (3343) Catwalk, Gila National Monument, NM (3341) Magdalena, NM Magdalena, NM 3308a Claunch, NM WPA school (2384) Claunch, NM WPA school (2385a) Claunch, NM WPA school (2385a2) Sacramento Tower Bridge 4215a Sacramento Tower Bridge 2088a Sacramento Tower Bridge (2085) Sacramento Tower Bridge 2092a