Hi fas51! How are you?
I tell again the cave you visited was the Crypta Romana. This cave is at the base of the hill of Cuma. I told you about a short film by Terry Gilliam, “The Wholly Family”, shot in its ancient cisterns. This is a frame from that film, I think you will recognize the ray of “light which entered from a hole in the ceiling shown on a circular rock seat in the center of the cave”...