You know, that rock wall displayed behind your featured lion.
There is already a suggestion to allow their decor to show, I wish I could find it and link right now because it would be much appreciated, but this is different.

Why not allow players to equip a background to a cave much like we can to our lions. Like:


It would function basically the same as on a lion. Consume a use, change that rock wall into the background you chose. Possibly it would 'deteriorate" with time since your cave isn't going to age and die, to mimic what it would be like if we were using it on lions. Maybe loose a use every 100 days?
It would not show on the featured lion's profile, the background equipped to the lion would.
And with no featured lion we'd be able to admire the beautiful background art.


Because lions don't live in caves.