I have 2 Ball Pythons in show tanks with 2 stories. The top story is low to the ground though. They both love to climb and explore both levels. They will curl up on both levels and I believe they move to "upstairs" or ground level to further temperature regulate. I know they are not really aboreal but they both seem to like to climb and hang down from the upper level as well as being on the ground. I would be careful about them falling from an area that is too high though. This pic shows some of the climbing area. Good luck and the rock look is beautiful, maybe shrink the height though.