Primož B.
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You won't see a church like this anywhere else. Do not miss it if you are in the Tolmin region! Pay for the tour to understand it.
The road to Javorca is not always open to private cars, so check on the Triglav national park page.
And check the bus schedule Tolmin-Javorca during the summer season and absolutely use it, if it's available! The road is extremely narrow and dangerous even by Slovenian standards. The last thing you want to do on holidays is to drive backwards, winding between rocks and precipices to pull-off.