Ключевые слова: adventure, aerial, america, area, bay, ca, california, cirrus, clouds, cloudscape, contra costa, contrast, copy space, county, diablo, fog, foggy, forests, haze, hiking, hills, hilly, landscape, lifestyle, mist, morning, mount, mountain, mt, nature, outdoors, panorama, panoramic, park, san francisco, scenery, scenic, sky, state, sunny, tourism, trail, travel, united states, usa, valley, view, visit, walking,