To the casual observer Mercury is a body double of our own moon, but they are very different on the inside. In images, however, it offers very little that is unfamiliar from what we can see with our own eyes when we look up. Included in this post are 4 full color images of Mercury with the above being taken in February, 2012.
The above and image also from February, 2012.
Above image captured by Messenger in April, 2012.
Above taken November, 2009.