The Casa del Arte, also called the Pinacoteca, is the art museum of the Universidad de Concepción and the single most important sight in the city. Its permanent collection covers two centuries of Chilean painting, from the early national period through to contemporary work, but most visitors come for the entrance hall and the mural that fills it.
Camarena's Presencia de América Latina is one of the great muralist works outside Mexico, planned during the height of the Latin American boom and gifted to the university by the Mexican government in a gesture of pan-American solidarity. Even if you only walk in for fifteen minutes, it's worth the detour. Entry is free, and the museum sits on the south edge of the leafy university campus.