Shelves, perches, stepped series of boxes, small totes with branches/perches/etc propped against it, rocks, etc... This is the fun and creative problem solving part of reptile keeping. Play around with a bunch of options, make note of the pros and cons alongside how well or poorly they're utilized by your critter and determine what's best for your scenario. The correct solution to problems varies depending on the keeper, the kept, the geographic location of both, the temperament of the individuals (both keeper and kept) and so on. Enjoy the ride