In the comarca there are plentiful buildings of "highlander" romanesque architecture, among which the Cervatos's and San Martín de Eliness collegiate churchs, the Santa María la Mayor church of Villacantid stand out; other remarkable churches are those of Bolmir y Retortillo, San Andrés and San Martín de Valdelomar.
The city of Julióbriga ruins,[REF] 4 km away from Reinosa, in Retortillo, deserve a special mention.