At the top of a set of steps off Via Atenea, this convent was founded by Cistercian nuns around 1290. A handsome Gothic portal leads inside, where the nuns are still in residence, praying, meditating and baking heavenly sweets, including cuscusu (sweet couscous made with local pistachios), dolci di mandorla (almond pastries) and conchiglie (shell-shaped sweets filled with pistachio paste). Press the doorbell and say 'Vorrei comprare qualche dolce' ('I'd like to buy a few sweets').
Upstairs, the small Museo Civico is worth a quick visit as much for the views over the Valley of the Temples as for its poorly labelled miscellany of objects.