This attraction does get a lot of local hype but not sure it is worth the tortuous drive. We were based in kotor and the journey took 2.5 hours one way in a hire car. The last 8km are on a road which seems to not know whether it is a track, single lane or two lane, no road markings or barriers exist. You arrive at the first set of car parks, very poor loos there, and spend a few minutes looking for the place in question. Minimal signage and a not very helpful guide book, Bradt!, should highlight that the monastery is a further 2or3km higher. Yes you can walk from there but currently it is 35 deg heat and it is a rocky steps trail. There is a car park about 500m from the monastery, with decent wc's much higher up which allows you to get ahead of the many local walking pilgrims to the site. However all you do is join another lengthy queue to actually get in the place. It was quite underwhelming close up for us non religious pilgrims, but to get any perspective and reasonable photo we found stopping on the winding road a couple of km down was a bit better. We didn't even bother going inside.
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