The Una River is characterized by high levels of calcium carbonate, which creates the distinctive travertine barriers through continuous deposition.
The park's travertine formation process is ongoing and scientifically recognized as one of the most active in Europe.
Štrbački buk is not a single fall but a complex of several interconnected drops and rapids.
The Rmanj Monastery, situated within the park, dates back to the 15th century and served as a major cultural center for the Orthodox population.
The Una River's name is derived from the Latin word 'una', meaning 'one' or 'the only one', reportedly named by Roman soldiers.
The river's water temperature remains consistently cold even during mid-summer, typically between 10 and 15 degrees Celsius.
Some sections of the river serve as a natural border between Bosnia and Herzegovina and the Republic of Croatia.
Nacionalni park Una is centered around the turquoise waters of the Una River, known for its extensive system of travertine waterfalls and cascades. The park spans 19,800 hectares along the border of Bosnia and Herzegovina and Croatia. The most prominent feature is the Štrbački buk waterfall, which drops 24 meters. Martin Brod contains the Milančev buk waterfall, the largest single cascade in the park. The river ecosystem supports over 170 species of medicinal herbs and 120 bird species. Visitors can access various zones, including the historical Rmanj Monastery located near the river's confluence with the Unac. Rafting is a primary activity due to the river's varied flow, ranging from calm stretches to intense rapids. The park functions as a protected area to preserve the unique limestone sediment formations. It provides critical habitat for large carnivores, including brown bears, wolves, and lynx.
The viewing wooden platform directly facing the Štrbački buk waterfall.
Wear waterproof hiking boots with high-grip soles as the travertine stone becomes extremely slippery when wet.
Bring a change of clothes if participating in rafting or visiting the base of the waterfalls, as spray is constant.
Carry your passport, as the park’s proximity to the international border may necessitate identity checks.
Do not attempt to swim near the high-flow waterfall zones due to powerful undertows and slippery terrain.
Some interior gravel access roads to remote zones may be inaccessible during heavy winter snow or significant spring flooding.
Strict 'leave no trace' policy; swimming is prohibited in protected travertine zones to prevent erosion.
