Just somewhere she can hang out on her own and scratch, but also just the climbing the towers stuff, she likes to jump around, and there's not much for her atm except window sills.
Another thing you can do Holy (depends on your landlord), you can put a cat door in and some netting outside. We have a sliding door that we slotted (can be undone with no damage) in a cat door to so the cats can out to the veranda. The veranda has netting around it so they can't get out and animals can't get it, they love it though as they can go outside while not being a danger to other animals. An added bonus is the litter trays are out there as well so they don't stink up the inside . Can give you more info if you're interested.