4 Olympus Sky

http://mars.jpl.nasa.gov/msl-raw-images/msss/00528/mcam/0528ML2087001000E1_DXXX.jpg

You can see the alien head and Mars folk underneath the trucks...about mid way towards the bottom. Slightly left... Or see:
http://whatsthatonmars.blogspot.com/2014/07/phobos-deimos.html