Viking 1 Orbiter image of linear features on the surface of Mars' satellite Phobos. The features appear to be related to the formation of the crater Stickney, off the image to the bottom left. The sub-Mars point is just off the bottom left corner of the image, and the image, centered at 10 N, 330 W, is about 7 km across. North is at 11:30.
The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain.
The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2]