Una National Park

The centrepiece of the 198-sq-km Una National Park is the glorious Štrbački Buk, western Bosnia's finest set of waterfalls. Other highlights include the more delicate Milančev Buk falls at Martin Brod and a wide range of partially marked trails for hiking and cycling. Different entry fees apply to different parts of the park, although admission is free if your name happens to be Una (bring ID).