Recently there was long thread about the BCA. I can now post possible answers to some of the questions, such as "Why is the BCA still raising membership prices when there is a significant amount still left in its coffers?"
Superb stuff! - I believe the caves featured are the stupendous and impressive Hundidero-Gato, Pozo de las Turquillas (near Sima Mones in the Sierra de las Nieves National Park), Cueva del Duque and one other (near Malaga) that I do not have the name of. All in Andalusia, Southern Spain.