I believe you are one of the camino underpasses for highway A-12 between Cirauqui and Lorca. There are a few (going east to west):
42.67778, -1.896804
42.679834, -1.928546
42.679407, -1.931744
42.678807, -1.938379
This site is run by Ivar at in Santiago de Compostela.
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