Ticket for the Imperial Forum?

Two years ago we paid individually to go down below street level into the ground level of the Imperial forums. As I recall there was a pamphlet (and maybe an audio guide too? I don’t remember), with reconstruction drawings and brief explanations of Trajan’s Market and other buildings that made up those forums in their heyday. You walk a boardwalk that sort-of parallels Via deli Fiori Imperiali, not wandering freely among the ruins, then the path cuts underneath the Via with a few small displays in nooks and crannies, before you pop out on the other side of the street, among bits of Julius Caesar’s Forum. A lot of this can be seen from outside of the fenced-in Imperial Forums space, from the sidewalks at street level, but it is a bit different being inside This was late afternoon, and I think that our ticket included access to a museum as well, but we didn’t go to it.