The patron of Introdacqua is San Feliciano martire, celebrated on the second-to-last Sunday of August.
The municipality also holds the Chiesa della Santissima Trinità, the Chiesa di San Giovanni da Capestrano, the Chiesa della Madonna del Rosario and Zona Speciale di Conservazione Monte Genzana. The church of the Santissima Trinità was built on the remains of a church ruined by a flood and was restored after the earthquake of 1706.