Convento de Arizkun y su órgano de la "flauta vasca" Monument · Baztan, Baztan-Bidasoa, Navarra Image of Baztan, not of the place itself. The enclosed Poor Clares' convent at Arizkun preserves an organ unique in Navarre, known as the 'flauta vasca' (Basque flute). A local tradition holds that couples about to marry would offer eggs to the cloistered nuns asking for good weather on their wedding day, a custom still occasionally practised today. Photo: Iñaki LL (CC BY-SA 3.0) What to see and do in Baztan