This Cistercian abbey lies quite near the mountains near the train station of Priverno/Fossanova about a 30 minute drive away from the house. It is very old, plain but beautiful. It is where St Thomas Aquinas died. You can walk around the abbey and part of the monastery.
They make their own biscuits at the abbey bakery and they are delicious. There is a bar (yes in a monastery!) and also a lovely restaurant. It is a great half day visit. If you feel up to it, there are some walks in the woods opposite the monastery. If you are very lucky and are there during August, there is a festival with artisans selling a variety of goods, artisanal beer and good food. Also there is flag tossing in medieval costume!