Castell de Can Ferrer is a heavily deteriorated fortification in El Montmell, Baix Penedès region of Tarragona, declared a Bé Cultural d'Interès Nacional (Cultural Asset of National Interest). Situated at 529 meters altitude on the Serreta de Can Ferrer, the ruins occupy a strategically advantageous position with views across the Montmell mountain range. The remains of masonry walls and storage areas suggest a structure adapted to the narrow hilltop summit, with maximum dimensions of 30 by 8 meters. The farmstead associated with the castle was mentioned in the 1553 census, documenting centuries of habitation and strategic significance.