Castle of Cruïlles (Aiguafreda) Monument · Aiguafreda, Osona, Barcelona The castle of Cruïlles, also called casal dels Cruïlles, is a building declared bien cultural de interés nacional (Catalonia's highest level of heritage protection), located in the district of Aiguafreda, in Osona. Important ruins survive of a large casal from the 14th and 15th centuries, partly inhabited as a farmhouse until recent times. It was first a fortified house and later a castell termenat; the place is documented from 1105, when it was already the residence of the lords of the quadra of Aiguafreda and the jurisdictional seat of the district, turned into a barony in 1577. In the early 16th century the building was destroyed by royal order, and it is now rebuilt. Photo: Antoni Gallardo i Garriga (Public domain) What to see and do in Aiguafreda