The Rocca Nuova is a beautiful ruin, there's not that much to see, but the scenery is gorgeous, looking over valley and mountains, the ýard'of the rocca with the olive trees is serene.
Walking around in that little town (beware, they still have afternoon closings and between 12 and 4 nothing is open!) you feel like you've gone back a few centuries. The entire village is beautiful, the old churches, everything. Definitely worth a morning or late afternoon if you're in the region.