Manor House of the Castellarnau Monument · Alins, Pallars Sobirà, Lleida Also known as la Força d'Alins, a 15th-century manor house of vernacular architecture, with a pyramidal slate roof and large openings that still retain the iron bars from its time as a prison. The original fortress of the viscounty of Castellbò was razed in 1518 during a Gascon invasion -in 1519 it is recorded how the tower and the wall were torn down by order of the duke of Cardona-; the tower, called "el Colomer", served as a jail until at least 1670, and the manor house was the residence of the Castellarnau family, lords of several forges in the valley, until the 18th century. Photo: Angela Llop (CC BY-SA 4.0) What to see and do in Alins