Located on the northern coast of Java, the province of Jakarta has rapidly expanded through the years, absorbing many villages in the process. In fact Jakarta is a conglomeration of villages known as kampungs, now crossed by main roads and super highways. It is small wonder therefore, that you may drive down one wide avenue one minute then suddenly find yourself squeezed into a small street together with scores of cars and motorbikes. The names of these former villages can be detected from their main streets, such as Tanah Abang, Kebon Kacang, Kebon Jeruk, Kampung Melayu, and many more. Together with its many suburbs Jakarta has become a megapolitan city. Therefore, when you visit Jakarta it is best to invest in a good map, or rely on GPS.
Jakarta itself is built on a wide flat delta, intersected by no less than 13 rivers. Fronting the city in the Bay of Jakarta are a large number of tiny islands, known as the Thousand Islands or Pulau Seribu, a tourist resort for snorkeling and swimming. To its south are the majestic volcanoes of Gede and Pangrango, where are cool mountain resorts like Bogor, Puncak, Sukabumi and Bandung.Capital city of a country with 240 million population, Jakarta is not only the seat of the national government and the provincial government, this city is also Indonesia’s political center. Moreover, Jakarta is also the center and hub of Indonesia’s national finance and trade. It is no wonder, therefore that you will find Jakarta an ever dynamic city, a city that never sleeps.
source : http://www.indonesia.travel/en/destination/474/jakarta