Where is the "face" on Mars located? How many pictures were taken of the "face"?

The so-called "face" on Mars is located in the Cydonia Mensae region at roughly 40.9 degrees North latitude and 9.45 degrees West longitude. As many as 18 images of the region were taken by the Viking 1 and 2 orbiters, but only seven have resolutions better than 250 m/pixel. The other 11 images have resolutions worse than 550 m/pixel and are virtually useless for studying the feature. Of the seven "good" images, the lighting and time at which two pairs of images were taken are so close as to reduce the number to five usable, distinct images.

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