The Tenerife Auditorium stands at the water’s edge in the island’s capital, Santa Cruz. The maritime location has led many people to compare its startling concrete quiff to the crest of a wave or a whale’s fin. In fact, it looks somehow more dangerous than either of those things: the blade of an Arabicjambiya dagger, perhaps, or the tensed tail of an angry scorpion. Architecturally, the auditorium is reminiscent of another harbourside concert hall, the Sydney Opera House – but this is sharper, leaner and more pared-back. Santiago Calatrava, its architect, has let it be known that he is very happy for his building to be ambiguous and open to interpretation – because, he says, ‘so, too, is music’.