The North Sumatra Triangle — a paradise for budget tourists. “Unity in Diversity” is the national motto of Indonesia. There are over 300 tribal-ethnic groups living on 6,000 islands. The remaining 11,000 islands are uninhabited. The larger islands are Java, Sumatra, Irian Jaya and Kalimantan. Kalimantan comprises two-thirds of the island of Borneo, the other one-third being East Malaysia (Sarawak and Sabah) and the Sultanate of Brunei.