The Una River was named by the ancient Romans who when they first saw it, shouted UNA, which means one or only one.
The total length of the Una River is approximately 212.
5 km, and it springs near the villages Donja Suvaja and Donji Lapac.
This area has attracted the large number of inhabitants, mostly because of the free access to the water.
The River spring is located at around 450 meters above sea level and it is protected as a geographical and environmental monument.
It is very cold and it emerges with great force creating many vortexes.
The first waterfall is only 20 m away from the spring.
The first large waterfall of its water course is located near Martinbrod, a village located at the bottom of the canyon where the Unac River flows into the Una River.
Una is particularly breathtaking at this point because the tuff created numerous channels, rapids and little islands, as well as several large waterfalls, the largest of which is approximately 55 meters high.
These natural waterfalls are the unique value that has been attracting enormous number of nature lovers and fishermen for decades, as well as artists seeking inspiration for their work in Una.
Traditionally, Una Regatta is held near Martinbrod (international tourist kayak race) that was interrupted in early 1990s, and restored after the recent war.
Martinbrod is known throughout Europe for rafting, a sport ideal for restless and unruly course of the River Una, and therefore, it attracts a large number of sportsmen from across Europe every year.
Nearby, there are several cultural monuments, the most significant one being the Monastery Rmanj and the Roman period structure Milaneva Tower that add to the magnificent beauty of the Una River.
Bosanska Krupa Bosanska Krupa is located in the northwestern part of Bosnia and Herzegovina, in the Una-Sana Canton.
The largest part of the city was developed on a low saddle between the hill Hum and the Old Town at an altitude of 176 m, in the wide section of the River Una.
This town got its name after a girl, Krupana from the 13th century.
The historical sources refer to this town in 1072 for the first time.
In 1565, it was invaded by the Ottomans, when the town started expanding towards both left and right bank of the River Una.
During the Austro-Hungarian rule, the town flourished both in cultural and commercial terms.
Bosanska Krupa today covers 556 square kilometers.
The Una River, which is a part of numerous tourism plans, flows through this city.
The river splits into several branches in the very center of the town thus creating river islands that are interconnected with wooden bridges.
The spring is located near the cave where, according to the latest research, olm was discovered.
The river Krušnica also flows through the town.
A natural phenomenon is related to this river.
Namely, although the divers dived down to 112 meters, they failed to find the bottom.
The river Krušnica is drinkable to the full stream length.