It’s worth dropping into this museum, one of the most important historical museums in the country, if only to see the colonial house it occupies: an 18th-century home that once belonged to Rafael Núñez, the colonial governor of Córdoba and later viceroy of the Río de la Plata. It has 26 rooms, seven interior patios, meter-thick walls and an impressive wrought-iron balcony supported by carved wooden brackets.