Castell de Collbató dominates a conical hilltop at 429 meters elevation above the town of Collbató, offering panoramic views of the Montserrat mountain range and surrounding valleys. This Romanesque rocky fortress consists of a watch tower surrounded by concentric rectangular walls, with origins tracing to 942 and documented evidence from 1113. The castle's ownership history reflects the region's power dynamics: initially held by the Viscounts of Barcelona, it passed to the Durfort family in 1292 and eventually to the Montserrat monastery in 1372. Though only the tower base and wall sections remain today, this modest yet strategically positioned castle exemplifies medieval defensive architecture in Catalonia's mountainous terrain.