Brijuni is a group of islands and a national park (since October 27, 1983) in front of the western coast of Istria. Separated from the mainland by the Fazana Strait, it is located some 6 km from Pula. The island group comprises of 14 islands and islets covering an area of 36 square kilometers. The length of the coastline of all the islands is 46.8 km. The most indented islands are Veliki Brijun (25.9km) and Mali Brijun (8.3km). The shores are mostly low and rocky but easily accessible due to the horizontal stratification of the rocks, and in some bays pebbles and sand can be found.

The National Park of Brijuni includes the following islands: Veliki Brijun, Mali Brijun, St. Mark, Gaz, Okrugljak, Supin, Supinić, Galija, Grunj, Vanga (Krasnica), Pusti (Madona), Vrsar, St. Jerome and Kozada. (Krasnica), Pusti (Madona), Vrsar, Sv.Jerolim i Kozada. Geologically and geo-morphologically Brijuni are the continuation of western Istria, the so-called "Red Istria". Since the depth of the channel of Fažana is just 12 meters, Brijuni were until some 10,000 years ago an integral part of Istria.

Kornati National Park occupies an area of about 220 km2 (54.000 acres). There are 89 islands, islets and reefs within the area of Kornati National Park (238 km of the coastline), which makes it the most indented group of islands in the Mediterranean. Because of its beauty and singularity of the archipelago, Kornati was first proclaimed a national park on July 24,1980.

The Kornati Islands were first colonized in the time of the Illyrians. Small quadrangular separate or grouped dwellings (found below Pedinka, above Željkovci, in Pod Selo by Trtuša and Grbe on the Island of Žut), remains of towns and castles (Šcikat, Stražišce, Tureta, Grbe) and numerous stone grave-mounds (tumuli can be found on almost every elevation on the Kornat and Žut Islands) testify to the fact that Kornati Islands were significantly inhabited during the prehistoric times. The main economic activity of the inhabitants was stock keeping but fishing also played a very important part in their economy.

The Krka National Park is located in Central Dalmatia and encompasses an area of 109 square kilometers along the Krka River: two kilometers downriver from Knin to Skradin and the lower part of the Čikola River. From the flooded part of the mouth, it is 72.5 kilometers in length, making the Krka the 22nd longest river in Croatia.

The source of the Krka River is at the base of the Dinaric Mountains, 3.5 kilometers northeast of the base of Knin and 22 meters below Topoljski Slap, Veliki Buk and Krčić Slap, which are noisy cascades in the winter but run dry during the summer.

Mljet National Park is located on the island Mljet, which  is elongated with an average width of 3 km and 37 km in length. It is an Island of great diversity and contrast. The park covers the northwestern part of the island with an area of 5.375 ha of protected land and surrounding sea. This area was proclaimed as a national park on November 11, 1960 and represents the first institutionalized attempt to protect an original ecosystem in the Adriatic.

It has a unique panoramic landscape of well intended coastline, cliffs, reefs and numerous islands, as well as the rich topography of the nearby hills, which rise steeply above the sea and hide numerous ancient stone villages. Mljet's outer coastline is exposed to the south sea and is therefore steep and full of "garmas" collapsed caves. The inner coastline faces the mainland and is exposed to the "bura", a strong northeasterly wind, but is less elevated with easier access.

The Northern Velebit National Park was proclaimed a national park on June 9, 1999 due to its richness of natural phenomena, outstanding biodiversity and its beautiful nature on a relatively small area.

The Park covers an area of 109 km², and inside there is the Hajducki & Rozanski Ledges Strict Reserve, famous for its geomorphological phenomena - the pits. Up to now, more than 150 pits have been discovered, out of which the most famous is Luke's pit, discovered in 1992.

Within the park, you can find a number of botanical garden. The Visibaba botanical reserve which is rich of the endemic Croatian Sibirrhaea (Sibiraea altaiensis ssp. croatica), the Zavižan-Balinovac-Velika kosa botanical reserve, famous for its outstanding collection of species of the mountain flora, and the widely known Velebit Botany Garden, founded in 1967.

Paklenica National Park stretches on the littoral slope of South Velebit directly above the settlement of Marasovići, up to the zone of the highest mountain peaks (Vaganski vrh, Babin vrh, Sveto brdo).

It covers the area of torrent flows of Velika Paklenica and Mala Paklenica, and their distinctive canyons carved vertically into the south slopes of Velebit and the broader surrounding area. The relatively small area has an abundance of geomorphological phenomena and forms, diverse flora and fauna, attractive landscapes and intact nature.  Paklenica was proclaimed a national park on October 19, 1949.

The most attractive and most valuable parts of South Velebit are surely the impressive canyons of Velika Paklenica and Mala Paklenica.

Plitvice is Croatia’s most well known national park. It became Croatia’s first national park on April 8, 1949. Thirty years later, it was added to UNESCO’s World Heritage list.

Plitvice Lakes is a group of sixteen small lakes gradually lined up and connected with numerous large and smaller waterfalls. The Plitvice Lakes are divided into the Upper Lakes and the Lower Lakes. The Upper Lakes are located in the area from Proscansko Lake up to the Kozjak, and the Lower Lakes in a limestone canyon which continues further under Sastavci as the River Korana canyon flow - 134 km long before reaching the mouth. The length of the Plitvice Lakes (according to the longitudinal cross - section presented by Eng. M. Petrik in 1952) is 8200 meters, and if we add to it Liman draga at Proscansko, Susanjska draga at Kozjak and the furthest point at Ciganovac lake – then that makes the longitudinal line going through all the lakes at 9050 meters.

The Risnjak National Park is located in Gorski kotar, the most wooded part of western Croatia.  The Park covers an area of 63,5 km2 including the central part of the Risnjak and Snježnik massif, as well as the upper flow of the river Kupa with its source area.

The area of the Risnjak massif was proclaimed a national park on September 15, 1953, at the suggestion of an eminent Croatian natural scientist and researcher of Risnjak, prof. dr. Ivo Horvat. Early in 1997, the NP "Risnjak" was extended to the area of the Snježnik massif and the source area of the river Kupa, thus fulfilling the wish of prof. dr. Ivo Horvat to protect and enhance this area. The area of the NP "Risnjak" belongs to the Dinaric mountain system which stretches from the eastern Alps to the Sar-Pindos Mountains.