Triglav National Park (TNP) is the only national park in Slovenia. It was created in its current form in 1981 and is located in the northwestern part of the country, which is also the southeastern part of the Alps. Mount Triglav, the highest mountain in the Julian Alps, is nearly in the center of the park.
Rila National Park, known as Национален парк „Рила“ in Bulgarian, is the largest national park in Bulgaria. It covers an area of 810.46 square kilometers (312.92 square miles; 200,270 acres) in the Rila mountain range, located in the south-west of the country.
Pirin National Park (Bulgarian: Национален парк “Пирин”), originally named Vihren National Park, covers most of the Pirin Mountains in southwestern Bulgaria. It spans an area of 403.56 square kilometers (155.82 square miles). It is one of three national parks in Bulgaria, along with Rila National Park and Central Balkan National Park.
The Semenic-Caraș Gorge National Park (Romanian: Parcul Național Semenic-Cheile Carașului) is a protected area classified as a Category II protected area by the IUCN. It is located in southwest Romania, within Caraș-Severin County.
The Rodna Mountains National Park (Romanian: Parcul Național Munții Rodnei) is a special protected area classified as a national park by the IUCN. It is located in Romania within the areas managed by the counties of Bistrița-Năsăud, Maramureș, and Suceava.
Piatra Craiului National Park is a special area that is protected by the country of Romania. It is classified as a national park under the IUCN category II. The park is found in the areas of Argeș county (6,967 hectares) and Brașov county (7,806 hectares).
The Domogled-Valea Cernei National Park (Romanian: Parcul Național Domogled-Valea Cernei) is a protected area classified as a national park under IUCN category II. It is located in Romania within the administrative areas of the counties Caraș-Severin, Gorj, and Mehedinți.
The Defileul Jiului National Park (Romanian: Parcul Național Defileul Jiului) is a protected area classified as a national park under IUCN category II. It is located in Romania, covering 92% of Gorj County and 8% of Hunedoara County.
The Cozia National Park, known in Romanian as Parcul Național Cozia, is a type of national park classified as category II by the IUCN. It is located in the south-central part of Romania, specifically in the northeast area of Vâlcea County. The park is found within the administrative areas of several localities, including Brezoi, Călimănești, Racovița, Perișani, Sălătrucel, and Berislăvești.
The Nera Gorge-Beușnița National Park (Romanian: Parcul Național Cheile Nerei-Beușnița) is a protected area classified as IUCN category II. It is located in Romania, within Caraș-Severin County.