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 East Nusa Tenggara, and North Sulawesi. Among Indonesian provinces in 2010, Sumatra's northern-most province, Aceh, reported the fifth-smallest number of Christians (53,624) or 0.23% of Christians within Indonesia. Aceh had the second-smallest percentage (among religions reported in the province) of Christians (1.19%), effectively tying with Gorontalo for the smallest percentage of Catholics (0.07%) and including the third-smallest percentage of Protestants (1.12%). Aceh operates Sharia law and all regencies are 99%+ Muslim, with the exception of Aceh Singkil (11.2% Christian) and Southeast Aceh (18.7% Christian). Both areas' Christian populations consist of ethnic groups whose homelands lie outside Aceh—in Aceh Singkil, Christians