Protected landscape guide
Wild rivers, ancient forests, and canyon landscapes in the northwest
Field summary
A quick read on the landscape, scale, and practical choices before you move deeper into the guide.
Area profile
The northwest of Bosnia and Herzegovina is shaped by water. The Una and Unac rivers have carved deep canyons through limestone plateaus, creating one of Europe's most dramatic river landscapes. Ancient beech and fir forests cover the higher ground, largely untouched and home to brown bear, wolf, and lynx. This area brings together protected areas that share a common character: wild, green, and defined by the sound of fast-moving water.
Protected landscapes
The official sites and local landmarks that shape this area guide.
Established in 2008, Una National Park protects the Una and Unac rivers and their canyon landscapes. The park is named after the Una — a river so uniquely beautiful that its name simply means "the one." Waterfalls, rapids, and emerald pools make it one of the most visited natural areas in Bosnia and Herzegovina, yet it remains largely undeveloped and wild.
Field rhythm
Use these notes to match the landscape with the kind of visit you want to make.
This area is built around water. Whether you are here for a day or a week, the rivers are the constant — for swimming, rafting, fishing, or simply sitting beside them and watching the current move. The forests above the canyons offer hiking and wildlife watching in near-total solitude.
Activities
River rafting and kayaking on the Una and Unac
Swimming at natural river pools and beneath waterfalls
Hiking on marked trails through beech and fir forest
Wildlife watching — brown bear, wolf, lynx, and eagle are all present
Fly fishing on designated sections of the Una
Cycling on gravel roads through the Una valley
Photography — the river light in early morning is exceptional
Field notes
Places where the landscape tells its story through water, forest, stone, wildlife, and local memory.
Field note 01Observation guidance
Stand on the wooden viewing platform above the lower falls and look upstream. The Una splits into multiple channels here, each dropping over a series of travertine barriers — a formation built up over thousands of years by calcium carbonate deposits from the river itself. The turquoise colour of the water is caused by the mineral content and the clarity of the river, not by depth alone. In spring, the volume of water is high enough that the spray reaches the platform. In summer, look for Huchen — Europe's largest salmon, endemic to Danube tributaries — holding position in the deeper pools below the falls. Early morning, before 9am, is when the light falls directly onto the water and the site is quietest.
Field note 02Observation guidance
Štrbački Buk is the largest waterfall on the Una river, dropping approximately 24 metres across a wide travertine barrier. Position yourself on the left bank viewing area and observe the full width of the falls — in high water the entire barrier is active, with multiple channels of water moving at different speeds over the travertine steps. Travertine is a living formation: the barrier grows slowly as calcium carbonate precipitates from the water and is colonised by algae and aquatic moss, which in turn trap more sediment. The barrier you are looking at has been forming for thousands of years and is still growing. Look downstream from the falls at the river colour — the intense green-blue is most vivid in mid-morning light when the sun is at the right angle to illuminate the riverbed through the clear water. Kingfishers nest in the clay banks on the far side of the river and are frequently seen in flight low over the water, particularly in the quieter early morning hours.
Field note 03Observation guidance
Walk slowly and stop frequently. The beech forest on the Kozara ridge is second-growth — it regenerated after significant clearance in the twentieth century — but it is now mature enough that the canopy is largely closed and the forest floor is in deep shade for most of the day. Stop and listen for two minutes without moving. The bird layer in a closed-canopy beech forest is almost entirely auditory — you will hear far more than you see. In spring, the wood warbler's descending trill and the flute-like song of the blackbird are the dominant sounds. In summer, the forest becomes quieter as breeding season ends. Look at the base of the large beeches for signs of bear activity — claw marks on the smooth grey bark, where bears have climbed to reach beech mast in autumn, are visible year-round and are one of the most reliable indicators of bear presence in an area where direct sightings are rare.
Suggested routes
Structured ways to move through the area, with enough context to plan the day before you arrive.
Route summary
A three-day introduction to the Una valley, combining river time with forest hiking and a half-day of rafting. Based in or near Bihać, with day trips into the national park.
Arrive in Bihać and drive south into the national park to Martin Brod. Spend the afternoon at the waterfalls — swim if the temperature allows, walk the riverside trail upstream to the quieter pools above the main falls. Return to Bihać for the evening. Dinner at a local restaurant — trout from the Una is the dish to order.
Morning rafting on the Unac river from Kulen Vakuf — a half-day trip through the canyon with a local licensed guide. The Unac is calmer than the upper Una and suitable for first-time rafters. After lunch, drive up to the forest above Kulen Vakuf and walk the marked trail through old-growth beech forest for two to three hours. Return via the Una viewpoint at Štrbački Buk.
An early morning visit to Štrbački Buk — the largest waterfall on the Una and one of the most photographed landscapes in Bosnia and Herzegovina. Arrive before 8am to have the site to yourself. Walk the full loop trail around the falls (approximately 45 minutes). Depart from Bihać after lunch.
Local support
Practical support points to help visitors plan with local context and fewer surprises.
Bihać is the main base for this area, with a range of guesthouses, small hotels, and apartments. Within the national park, several eco-lodges and rural guesthouses operate near Martin Brod and Kulen Vakuf — these book quickly in July and August. Wild camping is not permitted within the national park boundaries. Expect to pay €30–60 per night for a double room in a guesthouse; slightly more for park-adjacent lodges.
Licensed rafting and kayaking guides operate out of Bihać and Kulen Vakuf from April to October. Hiking guides with national park permits are available through the Una National Park visitor centre in Martin Brod. Guided bear watching walks can be arranged through specialist operators — ask at the visitor centre for current contacts.
Una National Park Visitor Centre, Martin Brod — open daily May to September, weekends only in shoulder season. The centre has maps, trail information, and a small exhibition on the park's ecosystems. Staff speak English.
Parking is available at Martin Brod, Štrbački Buk, and the main trailheads. Picnic areas with tables are located at both waterfall sites. Basic toilet facilities at major visitor points. No petrol stations within the national park — fill up in Bihać before entering.
Responsible travel
Move through these places with attention, restraint, and respect for local rules.
Bosnia and Herzegovina's protected areas are among Europe's least disturbed natural landscapes. Keeping them that way depends on every visitor making conscious choices. The guidance below applies across all three areas — please read it before you go.
Una National Park receives increasing visitor numbers each summer. The sites around Martin Brod and Štrbački Buk are particularly sensitive — please stay on marked paths, do not enter the river above the waterfalls, and take all waste out with you.
Stay on marked trails at all times
Do not enter the river in areas marked as protected spawning zones
No campfires outside designated areas
Take all waste with you — no bins at remote trailheads
Do not pick plants or disturb wildlife
Dogs must be kept on a lead within the national park
No drone flights without a permit from the national park authority
Rafting and kayaking on the Una requires a permit — use only licensed operators
Wild camping is not permitted anywhere within Una National Park. Fishing requires a valid permit, available from the national park office in Bihać. The Unac river above Kulen Vakuf is a protected spawning zone from March to May — no water entry during this period.
Before you go
Access, timing, and orientation notes for making the trip easier once you are in the field.
Access Information
Check road and site accessGetting There
Bihać is the main entry point for this area. By car from Sarajevo: approximately 3.5 hours via the M5 highway through Jajce and Banja Luka, or 4 hours via Travnik and Ključ. From Zagreb: approximately 2 hours via the A1 motorway to Karlovac, then south on the D1. There is no direct train service to Bihać. Long-distance buses connect Bihać with Sarajevo, Zagreb, and Banja Luka — journey times vary significantly. Within the area, a car is necessary to reach the national park sites.
Access Information
The road from Bihać to Martin Brod (approximately 50km) is paved throughout and suitable for all vehicles. The road to Štrbački Buk from the north is a surfaced forest road — narrow in places but passable by standard car. Some trailheads above 800m are reached by unsurfaced tracks that may be impassable after heavy rain.
Map Orientation
Offline guide
Download the Rivers and Forests of the North-West guide for offline use, especially useful when you're in the field without signal.
Connected areas
Continue through the other protected landscapes in this three-area guide.
