In reply to ollie1:antabria
Mountain bouldering, Asturias @ Quiros-La Collada and Las Rubias
Rosconorio - Cantabria (45 miles from Santandrer) looks like Grit!
Santa Gadea de Alfoz - Castilla de Leon (61 miles Santander, inland) Majpr moorland sandstone.
I haven't been to them but these are major areas in NW Spain. A copy of 'Boulder en Espana' Ed. Desnivel would be a worthwhile purchase.