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
Indonesia traditional sports in Indonesia. In areas with a history of tribal warfare, mock fighting contests are held, such as "caci" in Flores and "pasola" in Sumba. "Pencak Silat" is an Indonesian martial art and in 1987, became one of the sporting events in Southeast Asian Games, with Indonesia appearing as one of the leading forces. In Southeast Asia, Indonesia is one of the major sport powerhouses by winning the Southeast Asian Games 10 times since 1977, most recently in 2011. Government General Indonesia Indonesia ( , ; Indonesian: ), officially the Republic of Indonesia ( ), is a country in