The Verge highlighted some amazing photos from NASA and University of Arizona’s HiRISE (High Resolution Imaging Science Experiment). From the HiRISE FAQ page:
HiRISE returns images of the Martian surface with higher resolution than ever seen before from an orbiter. This means we can see extraordinary detail in all kinds of surface features. Scientists all over the world are already using these images to understand many previously-unexplained phenomena on the Red Planet. We might also discover brand new types of features never seen before! The stereo and color capabilities will also allow us to explore Mars in 3D, and with compositional information. The ultra high resolution also makes HiRISE the perfect tool for investigating the safety of future landing sites for other missions, such as the Phoenix lander or the Mars Science Laboratory. We’ve also done some searching for past Mars landers, both successful and not. But even without the higher resolution and added capabilities, additional cameras in Mars orbit are always valuable for imaging new terrains on Mars, and for monitoring the dynamic surface and atmosphere for activity and changes.
A few more favorites: