Jakarta is an upbeat city that moves at a fast pace, whether that means the traffic on the streets or the redevelopment projects that continue to pop up all over town. This city of over 10 million sprawls over the island of Java where the Ciliwung River flows into Jakarta Bay, and eventually the Java Sea. Founded in the fourth century, the city served as a key trading port in the ancient Kingdom of Sunda, then became a city crucial to the Dutch East Indies under colonial rule, and in the modern era has grown into the financial, cultural, and political capital of Indonesia.