Can you describe the ones you most remember? I see the image but I'm more interested in your (memory of your) subjective experience. What level of creative freedom did you have in the interactivity?
The most vivid memory I have of myself spending hours on Encarta as a child was with their "flight simulator" / bird's eye view. I will try to find a video of it but I am sure it will be disappointing in today's standards as well.
Best example I could find: https://youtu.be/Dl36Ty2PqMU?t=1147