Here are a few suggestions for your next trip from Zagabria

In 3 hours, you can reach Lubiana, Maribor, Kranj.

In 4 hours, you can reach Graz.

In 5 hours, you can reach Fiume.

In 6 hours, you can reach Budapest.

In 7 hours, you can reach Vienna, Spalato.

In 8 hours, you can reach Bratislava, Linz.

In 9 hours, you can reach Brno, Debrecen, Monaco, Szeged, Nitra.

In 10+ hours, you can reach Berlino, Roma, Parigi, Bucarest, Varsavia, Stoccolma, Praga, Bruxelles, Amsterdam, Zurigo...