As an Austrian I have to recommend you Vienna but also unbiased Vienna ist the city to visit. There is so much to see and to experience in this city. Additionally, it is the biggest city from the 3 you mentioned. Almost 1 million more people than Zagreb.
Sure Ex-Yugoslavian girls are pretty but almost 50% of the population has an immigration background, so lots of slavic girls too.
Sure Ex-Yugoslavian girls are pretty but almost 50% of the population has an immigration background, so lots of slavic girls too.