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
Architecture of Indonesia in Balinese architecture. However, typical ancient Javanese Hindu-Buddhist architecture has been the source of inspiration and recreated in contemporary architecture. For example, Ganjuran Church in Bantul, Yogyakarta contains a "candi"-like Hindu-style shrine dedicated to Jesus. Although religious architecture has been widespread in Indonesia, the most significant was developed in Java. The island's long tradition of religious syncretism extended to architecture, which fostered uniquely Javanese styles of Hindu, Buddhist, Islamic, and to a lesser extent, Christian architecture. By the fifteenth century, Islam had become the dominant religion in Java and Sumatra, Indonesia's two most populous islands. As with Hinduism and Buddhism