Castles are great locations, very quiet, often tucked away at the end of a short dirt road with cypresses, an excellent introduction to your “agriturismo” (rural tourism).
The history of the castles is amazing and the afternoon tea (or glass of wine) with the owners explaining the history will surely be a special experience.
The balconies have breathtaking views of the countryside and you can climb the towers for some excellent photos. There are often many separate buildings for lodging, so if others are there, your privacy is assured.
Moreover, most of them have a pool where you can sunbathe and relax… Is there a better place to share with your love, spending thousands of sweet moments together?