Hi Joan. One way would be to put the photo on your own profile and then share it out. However, there can be issues with permissions as most people don't have relatively open access to their own profile page for others, which can restrict the viewing of the photo.
The easiest way would be to create a Free Space page, and put the photo there. You can open access to the Free Space page which will make the photo viewable by all.
If you need instructions on how to do this, please ask.