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Also depends on which route you take, the very scenic one goes to the Montenegrin Border at Scepan Polje (not very busy), with the first part into Montenegro incredibly scenic, after that the road to Niksic and onto Podgorica is a very good highway (but watch the speed limit). You could sidestep to one small monastery before Niksic, and a 10km side road after Niksic to the famous Ostrog Monastery, which is built out of the rocks.
