A very beautiful national park with amazing views, I wish I could give it 5 stars HOWEVER it was a VERY arduous experience... There should be warnings & caution on the maps and trails as well as by guides about the difficulty and length of some routes. We underestimated the longer loop route starting from Zavizan heading west on the educational trail towards gorna klada and then south towards Alan, then going east toward rosijeva koliba (after the turning to velike brisnice) and finally north along the premuziceva staza. If taking this route, be prepared for 8 hours & 27km of extreme hiking (looks much less on the map!) along some fairly perilous and not well maintained areas. Particularly on the trail toward Rosijeva Koliba, which should definitely be marked as a difficult trail, the route markings became much harder to follow, the difficulty increased (very steep sections including having to scramble up rocky areas), and the route was not well maintained (e.g. trees blocking the path, or no path at all having to go through tall weeds which was very confusing). Luckily we are quite physically fit and active so moved very fast but it was a pretty scary experience overall as the paths are very windy and steep, it was beginning to get dark (there are lynx, bears and other animals in the forest) and we were still in the forest after 6 hours walking, having seen limited views and come across no other people for the whole day. There is no service or internet once in the forest so you cannot use a map or call for help if needed say if you become injured. All things considered, once we made it onto the mountain path (Premuziceva Staza) the views were stunning but for me this particular route was not worth it, I suggest sticking to that main path unless you are an extremely experienced hiker/mountain climber (god forbid what may have happened if our map & direction skills or physical fitness were poorer, I dread to think).