Mariner 7, Mars, the “Giant’s Footprint” on the south polar cap, August, 1969,

foreshortened obique view of two adjacent craters, the photograph showing an area approximately 85 by 200 miles,

vintage gelatin silver print, 19 x 23.5 cm. (7 1/2 x 9 1/4 in.), blue NASA caption numbered 69-H-1411, verso