Una National Park

Una National Park in northwestern Bosnia protects the upper course of the Una River and its tributaries, a system of waterfalls, rapids, and tufa barriers in a landscape of beech and fir forest. The Štrbački Buk waterfall on the Una and the Martin Brod falls on the Unac tributary are the largest in the park, and both can be approached by riverside paths through the forest. The park borders Croatia's Plitvice Lakes system and shares a similar geology of calcium carbonate deposition.