The patron saint of Castel San Giorgio is Saint Roch, celebrated on 16 August with the traditional «Festa d'agosto».
The town holds the Hermitage of Santa Maria a Castello and the Residenza Baronale, as well as the Church of Santa Barbara di Torello, dating to the 11th century and recently restored: secluded in the hamlet of Torello, at the foot of Monte Lungo, it is approached by a long staircase.