Today's Image of Mars is of a simulated sunrise on Mars taken from the vantage point Cape York. This image was created by Stuart Atkinson using an image taken by Mars Exploration Rover Opportunity. He then inserted the Sun and and sky effects. Atkinson has dubbed this "Endeavour Sunrise." While he claims it is not accurate, I will venture to say it is about as accurate an interpretation as you're going to get. The only thing more accurate would be if Opportunity was sending back full-color images.
Clicking on this image will take you to Stuart Atkinson's post on The Road to Endeavour which contains this image.