Indonesia a rich cultural heritage that reflects Indonesia's dynamic history and ethnic diversity. Indonesia has a well-preserved natural ecosystem with rain forests that stretch over about 57% of Indonesia's land (225 million acres). Forests on Sumatra and Kalimantan are examples of popular destinations, such as the Orangutan wildlife reserve. Moreover, Indonesia has one of world's longest coastlines, measuring . The ancient Prambanan and Borobudur temples, Toraja and Bali, with its Hindu festivities, are some of the popular destinations for cultural tourism. Indonesia has 8 UNESCO World Heritage Sites, including the Borobudur Temple Compounds and the Komodo National Park; and a further
Christianity in Indonesia the second-smallest number of Christians (22,756) or 0.1% of Christians within Indonesia. Slightly larger concentrations are found in Mataram, and Bima cites, both with just 2% Christians. Among Indonesian provinces in 2010, East Nusa Tenggara had the highest percentage (among religions reported in the province) of Christians (88.88%), including the highest percentage of Catholics (54.14%) and the fifth-highest percentage of Protestants (34.74%). East Nusa Tenggara also reported the highest total number of Christians (4.16 million) or 17.8% of Christians within Indonesia. The mix of religions and denominations varies significantly from area to area. Sumba island has a Catholic majority in