If you&#39;re planning on visiting the opera during your stay in Poland, we recommend going for something authentically Polish - in this case,&nbsp;<em>Halka</em>, an 1848 opera by composer&nbsp;Stanisław&nbsp;Moniuszko, with a libretto by poet&nbsp;Włodzimierz&nbsp;Wolski. A tale about&nbsp;the tragic love of highlander girl&nbsp;Halka&#39;s&nbsp;love for noble-born&nbsp;Janusz, it depicts scenes of&nbsp;19th-century&nbsp;Polish highlanders and nobility.