In the east of the region, between the municipalities of Ludiente and Fanzara, in the town of Argelita is the Castle of Bou Negre or Buey Negro. Of Arab origin, the walled enclosure covers an approximate surface area of 15 hectares, making it one of the largest fortresses in the Valencian Community [...]

Overlooking the valley of the "Barranc del Castell", to the southwest of the municipality, is the castle of Atzeneta del Maestrat. Of Arab origin, the fortress was attached to the territorial demarcation of Culla, being known as "el Castellar" during the medieval period. [...]

Located in the east of the region, between the municipalities of Chóvar and Soneja, Azuebar has the ruins of its eponymous rock castle on the top of a hill, overlooking the Palancia valley. Built in the 12th century, it was used as a fortress during the Muslim period and later modified during the Christian period. In the 13th century, James I gave possession of the castle and the town to Juan Gonçalvez de Heredia (1238). The Town Charter was granted to the town in 1609. [...]

In the south of the comarca, between the municipal district of Castellón de la Plana and the county border of the Plana Baixa, we find the "Castell Vell" in the town of Almassora the "Castell Vell". On a small elevation on the left bank of the river Mijares, between the new bridge and the railway bridge, it is a fortress built during the Muslim domination. [...]