I would imagine that Granada is delightful in October - I can't vouch for the condition of the gardens but I doubt they'd be too shabby.
I remember the thrill of standing on the exact spot where Columbus, having been rebuffed by his own king, pitched the king of Spain to underwrite his adventures. And nearby, Suspire del Moro, where the last of the Moors was in the same year expurged from Iberia, looking over their shoulder and sighing with regret at the beauty they had created in their nigh-800 years of awkward residency, and were leaving. So much momentous world history flows from that place and time.
I find the inability to travel is really cramping my style and I guess it may be the same for you. I know you're not a toper but wine is a comfort to me, most good wine having co-ordinates in place and time. If you can't travel you can at least have the holiday come to you in a bottle!
All the best, and I hope you make it to Spain before too long.
M