Pyramid Hills, CA oil (1523) Central Valley California Aqueduct 1599a Central Valley California Aqueduct 1600a Kern Westside oil (1602) SF Buena Vista Park 1526a SF Buena Vista Park 1526aa SF Buena Vista Park 1527a SF Buena Vista Park 1528a SF Presidio National Cemetery 529a SF Presidio National Cemetery 1530a SF Presidio National Cemetery 1530aa SF Presidio National Cemetery 1531a SF Presidio National Cemetery 1533a SF Presidio National Cemetery 1534a SF Presidio National Cemetery 1534aa SF Castro: trolley 1595a SF Castro: trolley 1596a SF Castro: Levis ad 1597a SF Bay Bridge 1598a Marine Mammal Center 1583a Marine Mammal Center 1582a Marine Mammal Center 1542aa Marin Headlands 1542a Pyramid Hills (1517) McKittrick, CA 1514a Kern Westside oil (1513) Oceanside, CA 1503a Chadron, NE (6a) Chadron, NE (1a) Mesa Verde National Park, CO (4a) Mesa Verde National Park, CO (5a) Black Canyon of the Gunnison NP, CO (2a) Black Canyon of the Gunnison NP, CO (6a) Black Canyon of the Gunnison NP, CO (12a) Colorado Rockies (1a) Canyon de Chelly National Monument 3a Canyon de Chelly National Monument 5a2 Canyon de Chelly National Monument 5b Canyon de Chelly National Monument 1a Canyon de Chelly National Monument 1b Family 1501 Family 1499 Family 1498 Family 1497 Family 1496