Opportunity sent this sublime postcard from Solander Point, taken November 12, 2013. [2018 update: The rover is still functioning well, at 13+ years into the mission, about 38 times its design lifetime.] (source and description)
[2018 update: It is still climbing, looking for a good view of Endeavour crater's rim layering and morphology, and finding a comfortable slope to soak up sun during the coming winter. (source and description)]
Here's a composite pic of Burns Cliff, in Endurance Crater, back in November 2004. (original composite and description, with stretched colors)