Below shows original, untouched photo. Above I colored it to make it easier to see for some.
Date of rediscovery: December 13, 2015
Location of discovery: Mars
Source photo: http://areo.info/mer/spirit/108/tn/2P135963098EFF3300P2395L5M1_L2L5L5L7L7.jpg.html
I found this same face two or more years ago, but today I stumbled upon it again and thought I would share it with you. It is extraordinary and highly detailed. The photo was taken by the Spirit Rover during Sol 108 of its travels. The yellow part below may be a beard, or it may be a shoulder/chest area.
The face shows similarities to Earth sculptures by the ancient Sumerian culture.