The only Adriatic cave where underwater sunlight creates liquid sapphire—Croatia’s 15-minute phenomenon costs €10 vs Capri’s €180 chaos
I’ve spent twenty-five years photographing caves across six continents, but Croatia’s Blue Cave on Biševo Island stopped me mid-breath. This isn’t another sea grotto with pleasant blue water—this is the only Adriatic cave where underwater sunlight creates liquid sapphire, a optical phenomenon so precise that scientists measure it in 15-minute windows when the sun hits … Lire plus