caption: The image shows an old map of the city of San Francisco, California, with numbers and text written on it. It appears to be a photo of an astrolabe, a celestial body located in the night sky. The map is filled with intricate details, such as stars, constellations, and other celestial bodies, all of which are labeled with their names. The colors used in the map are mostly shades of blue, green, and yellow, giving it a vintage feel.