Indonesia has some superb natural attractions, not least of which are the volcanoes, most easily visited in Java, Lombok and Bali.
Rainforest covers much of Sumatra and dramatic mountains can be seen in Sulawesi or West Papua amongst other places. Underwater, Indonesia has some of the world’s best diving.
Wildlife in Indonesia of course includes seeing Orang-utans in Sumatra or Kalimantan (Borneo).
Off the beaten track National Parks can be visited in Java and Kalimantan and Komodo dragons are a highlight of any wildlife holiday in Indonesia.