Compromising over 17,000 islands, Indonesia is the world's largest archipelago and home for at least 235 million people. The vast Indonesian archipelago spans 5,120 km across the equator, positioned between the Asian and Australian continents. Four-fifths of the area is sea with the major islands of sumatera, Java, Kalimantan, Sulawesi and Papua. The 300 ethnic groups that exist harmoniously give birth to a potpourri of cultures and fascinating people. Indonesia's landscape is greatly varied.