Below is the sign about the yew tree in the photo above, translated into Spanish:
YEW TREES L'IGLESIA QUIRÓS.
YEW TREES Taxus baccata 1.
HEIGHT: 10 meters
CROWN DIAMETER: 15 meters
CORD: 6.6 meters
THE FRUIT IS POISONOUS IN THE MALE, WHOSE BERRIES, ESPECIALLY IN HISPANIA, CONTAIN A DEADLY POISON.
Natural History Pliny Secundus
WHEN THE BARBARIANS WERE REDUCED TO EXTREME NEED, IN COMPELLITION, IN THE MIDDLE OF A FEAST, THEY KILLED THEMSELVES WITH FIRE, THE SWORD, AND THE POISON THEY CUSTOMIZED TO EXTRACT FROM THE YEW TREES THERE. Thus, most of them were freed from captivity, which seemed harder than death to those who had not yet been subjugated.
Bellum Cantabricum et Asturicum
Lucius Annaeus Florus
DECLARED A NATURAL MONUMENT BY DECREE 71/95 OF APRIL 27 (BOA 129)