The patrons of Castelveccana are Saints Peter and Paul, celebrated on 29 June; the municipality holds the Chiesa dei Santi Pietro e Paolo.
Every summer, between the end of July and the beginning of August, the hamlet of Caldé hosts the «Tutto è Numero» festival, one of the most important Italian festivals of mathematical culture and games. The municipality also holds the Chiesa di Santa Veronica, the Chiesa di San Giorgio, the Chiesa di San Genesio and the Rocca di Caldé.