The parachute photograph is truly the most unique photograph in existence.
There are only a few recognizable third-person shots of man-made objects on other planets: The photos of the Sojourner rover, the photos of the the Spirit and Opportunity landing gear, and of their heat shields. And that's it.
And out of those, only the Sojourner rover was caught in action. This is the only photograph from a distance, from an unrelated spacecraft, of a lonely man-made object that's currently preoccupied with the most difficult task that Martian landers have undertaken.
A photo of the parachute in action? It gives me the goosebumps...