11 nights in Rio de Janeiro, HELP

I will be staying in Rio from July 22 - August 3. I need help deciding where to spend a side trip for two nights out of the 11. I was originally thinking ilha grande but I think the weather might be a bit too cold to fully enjoy. I would enjoy the hikes tho. Another thought was to possibly fly or take overnight bus to sao paolo but I think it won’t have much to offer that Rio doesn’t have. Please let me know a couple other options and some reasoning why?