Santuario de Montesclaros

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Signposted from Arroyo, 12km southeast of Reinosa, this tranquil monastery has a fine site overlooking the Ebro valley and a history going back to at least the 11th century. If you find the church open, ask to see the pre-Romanesque crypt just beneath, with ancient Celtic symbols and sogueado (twined-rope) motifs carved into the stone.

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