Okay,
I understand than. I've never been there, except in Dubrovnik. The closest I was is with Mljet island.
I've seen at your photos nice archipelago and that's why I thought it's somewhere near Korcula, because just left from the town Korcula ( in direction to Lumbarda ) at the island Korcula, is beatiful archipelago with many small islands.
According to your photo and the position of archipelago behind, I think than it's Kolocep.
