Where was La cabina filmed?

1972 television film directed by Antonio Mercero

La cabina (1972) was filmed in Madrid-Barajas Airport, Aldeadávila de la Ribera, Aldeadávila Dam and Plaza del Emperador Carlos V, 4 places named in its Wikipedia article, in Spain. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data

Places per Wikipedia's article

The Wikipedia article names 4 places. Each links to the sentence that says so.