Surabaya. The city used to be the trading hub for the inland empires of Java. Situated on the mouth of the Brantas River. Surabaya is now a modern industrial city, considered the economic and trading center of Eastern Java and the home to the nation’s navy. When strolling around the city, you can also find the Sura and Baya monument. Depicting the folklore version of a fight between a shark and a crocodile. The story is immortalized as an iconic monument of Surabaya.