The church of Sant Serni de Canillo
Built between 1758 and 1768, the church still preserves vestiges of its earlier Romanesque construction, such as the baptistery and the walls. It stands out for its central nave and its bell tower, which is considered to be the highest in Andorra.
Inside, a Gothic crucifix on polychrome wood dating from the late 14th century and an altarpiece dedicated to Sant Cerni can be seen. Outside, at the entrance to the church, there is a baptismal font that has been converted into a fountain.
In 2009, during renovation work, archaeological remains were discovered in the basement of the nave.