The Park area is located in the far west of Bosnia and Herzegovina on the border with Croatia. It encompasses the area canyon part of the rivers Una and Unac, and the space between those two rivers. The National Park has an area of 19,800 hectares.
The idea of protecting the river Una, dates back to the 60s of the last century, when the lovers of its value, organized the first international tourist Una regatta. Suitable environmental conditions have enabled the development of special aquatic ecosystem, which makes this area one of the richest in the Dinarides.
In 1985 "Una emeralds" were established, an association for creating a culture of preservation and protection of the river Una. It became the National Park in 2008.
This area is a unique natural complex in this part of Europe due to its location on the border of three climate areas, karst formations and hydrography, which are, together with basin of Korana and Krka, unique in the European range. Waterfalls and rapids of Una represent a remarkable heritage, and the entire upper flow is characterized by a rich biodiversity. Gentian, edelweiss, juniper pine are just some of the rare and endemic species in this area. Out of 1900 plant species, a hundred of them were recorded as medicinal, edible, aromatic and vitamin. Complete protection in certain areas allows unimpeded growth and development of a large number of species and families of fungi. Exceptional quality of water fulfilled conditions for development of many fish species, amphibians and reptiles. In this area there is 120 species of birds, among which is of particular interest quite an endangered species, the black grouse. Among the 50 protected species of mammals are endemic oro-Mediterranean hairy (fleece) mouse and eastern Alpine endemic Alpine mouse. There are also the largest European predators: wolf, lynx, bear, otter, badger, weasel.
Rivers Una, Unac and Krka as the three pearls of the natural heritage, with a unique blue green colour are abundant in cascades, rapids, waterfalls, among which we highlight: Martin Brod, Štrabački buk, Troslap ... The particularity of the River Una is distinctive length of its "travertine" flow, with a whole range of accompanying phenomena - travertine caves, travertine islands, barriers and cascades, as well as exceptional forms of valleys and gorges of the canyon type.
This space is in the cultural-historical respect as well an area that is rich in archaeological sites and historical monuments heritage. The special position of the area towards the transit road to the sea, in the past led it under the influence of many cultures, as evidenced by numerous archaeological sites, the remains of medieval fortifications and cities of which the most notable are Rmanj, Ostrovica and Orašac.
Lush forests, endemic species of trees, crystal clear mountain rivers, springs, exciting landscapes, and above all, a healthy environment, make this place attractive for adventure tourism as rafting, kayaking, canoeing, hiking canyons, hiking, mountain bike rides. Streams in the Park are rich in fish, so the sports and recreational fly fishing is developed, as well as other allowed ways of fishing. Park offers diving in the wild river the so-called speed river diving, with a lot of excitement, through the fight with underwater currents and river obstacles.
Bihać, the closest centre of the NP Una, is connected by the main road with the capital of B&H Sarajevo, in the length of 310 km. The distance from the capital of Croatia, Zagreb, is 150 km, partly by the main road and partly by the highway. The same distance is to the Adriatic Sea.