On January 12th 1959, five male students failed to report for lessons at a local school in Nerja, not in itself an earth shattering event – indeed the tutor, one Carlos Saura Garre, assumed they had either met some girls or had decided that a movie would be more entertaining than a lecture. Neither of these was the case: the boys had in fact plucked up courage to go through a small entrance to a sinkhole and head underground to see what they might discover. What they did discover must have blown their young minds. Beneath the waste land just behind the village of Maro, they walked into a gigantic…