Nope, it's in Arabia Terra.
It's location was identified on the Cydonia Yahoo group, http://tech.groups.yahoo.com/group/cydonia/:
It's about 1/4 of the way down and half way over from the left.
It's turned upside down from the orientation of the Russian image in this image.
It comes from here:
Crater in Western Arabia Terra with Stair-Stepped Hills and Dark Dunes (PSP_002047_1890)
Credit: NASA/JPL/University of Arizona
http://hirise.lpl.arizona.edu/PSP_002047_1890
On that Cydonia group, the "door" is described as only a shadow.
Bob Clark
