Mosaic of the Martian Olympus Mons volcano and its surrounding plains made from two color composites using the following Viking 1 Orbiter images:
f735a41 and f735a42 (violet), f735a45 and f735a46 (green), f735a47 and f735a48 (red). These images were taken on June 22, 1978.
The mosaic covers an area of nearly 1,600 x 800 kilometers. North is right and west is up.
(Image Credit: NASA/JPL/Arizona State University/Mosaic by astroarts.org)