There are international airports in Zagreb, Zadar, Split, Dubrovnik, Rijeka, Osijek and Pula. There are international airports in Dubrovnik, Osijek, Pula, Rijeka, Split, Zadar, and Zagreb. Gallus was led to Pola, Istria (now Pula, Croatia). KUD Idijoti was a punk rock band from Pula, Croatia. Dubrovnik, Opatija, Pula and Rijeka previously also operated trams. The universities of Dubrovnik, Pula and Zadar do not have independent colleges. A broadcast within the Pula Arena in Croatia saw Nils Frahm perform. It is linked with the Maru a Pula School in Botswana. Its population density is , ranking Pula fifth in Croatia. The association has most members in the towns of Rijeka, Zagreb and Pula. The pula is the currency of Botswana. The country's currency is the Botswana pula. The Pula Arena (, ) is the name of the amphitheatre located in Pula, Croatia. The Botswanan pula replaced the rand at par in that year. One such place where these women were imprisoned is Bahay na Pula.