The coastline of Indonesia is composed of more than 18,000 islands, including some of the largest in the world. The coastline stretches for 5,193 miles (8,500 kilometers) from the Sabang in the northwest to the Merauke in the southeast.
The Indonesian coastline is divided into three distinct regions. The first is the western coastline, which is characterized by rugged, mountainous terrain and deep, narrow bays. The second region is the central coastline, which contains a number of large, low-lying islands. …