Klaićeva Street is Vrbnik's most photographed feature — a passage between two stone buildings so narrow that you cannot walk through it face-forward without turning sideways. It is genuinely very narrow, though whether it is technically the narrowest in the world is a matter of ongoing municipal dispute with several other Croatian towns.
The street is easy to find — ask anyone in the old town — and takes about three seconds to walk through. The experience is more amusing than spectacular, but it makes for a distinctive photograph and the alley itself is a good illustration of how tightly medieval builders packed their houses onto the available rock.