I'm not quite sure what you're looking for here, so I expect this answer to be inadequate in itself, but hopefully you can point at it and explain what it does not do that you need.
Have you tried the pagetree macro? You get the structure of nested pages laid out for you in there. It doesn't go above a space level, but you can imagine a simple flat "every space is one branch under Confluence" for that part.
You could click on the "Space Tools" in the bottom-left corner of the screen, then click "Reorder Pages", and then you will be able to see a tree view (like a folder structure) of all pages in the space. You could also use the pagetree macro as Nic recommended.
Do you use templates with Confluence? Take part in a remote 1-hr workshop. You'll receive USD $100 for your time! We're looking for people to participate in a remote 1-hr workshop...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs