Early version of the horizon mosaic, still missing two of six panels
None of the pictures today will be in color. I think it's likely none of the images tomorrow will be in color either. But the black-and-white is totally awesome.
NASA / JPL / U. Arizona
Early version of the first horizon 'postcard'
This is a mosaic of four images. You can see how the ground is broken up into polygonal patterns. In the distance, these polygons seem to have raised ridges. In the foreground, you can see that they are covered with small pebbles.