Durmitor seems to be one of those sites that were inscribed early on, but would have a somewhat harder time achieving inscription today. I did not visit the main part of the national park around its namesake mountain (only saw it from a distance), but did see the quite impressive Tara River Gorge (part of the national park), which is supposed to be the deepest gorge in Europe. As it was raining, I did not do any hiking, which would probably be necessary to fully appreciate everything the park has to offer. In general, I would say that a visit to the park, especially the gorge, makes a nice excursion and is a good distraction from the tourist resorts along the Montenegrin coast. The WH value is not that apparent, but as there are not really many natural sites in Europe, I suppose the inscription is justified because of its flora and the glacier and karst features.