Both nature and culture are major components of Indonesian tourism. The natural heritage can boast a unique combination of a tropical climate. These natural attractions are complemented by a rich cultural heritage that reflects Indonesia's dynamic history and ethnic diversity, that 719 living languages are used across the archipelago. The ancient Prambanan and Borobudur temples, Toraja and Bali, with its Hindu festivities, are some of the popular destinations for cultural tourism.
Indonesia has a well-preserved natural ecosystem with rainforests that stretch over about 57% of Indonesia's land (225 million acres), approximately 2% of which are mangrove systems. Forests on Sumatra and Kalimantan are examples of popular tourist destinations. Moreover, Indonesia has one of longest coastlines in the world, measuring 54,716 kilometres (33,999 mi).
Sources : - Wikipedia Indonesia