Pirin National Park is located in the Pirin Mountains, in southwest Bulgaria. The park includes seven municipalities in the district of Blagoevgrad: Bansko, Gotse Delchev, Razlog, Sandanski, Strumyani, Kresna, and Simitli. In 1962, when Pirin National Park was established, it was known as the Vihren Nature Reserve. At that time it covered 6,212 decares and comprised the highest points of the Demyanishka and Vihren regions. Over the years the territory of the park was increased many times over, and it now covers 40,000 decares. Since 1983, the park has been protected as a UNESCO Heritage Site. The park includes one of the oldest reserves in Bulgaria -- Bayuvi Dupki -- Dzhindzhiritsa. The area was granted this status in 1934 so as to protect the endangered black and white fir (Pinum peuce) and the habitats of many other plants and animals. In 1977, this reserve was included by UNESCO on its list of reserves as part of the "Man and Biosphere" program, as was the park's Yulen Reserve, in 1994.See more: bulgariatravel.org/en/object/53/Nacionalen_park_Pirin