zinzulusa caves, near castro on the salento peninsula in puglia, italy. shadows of four people can be seen against the stone walls

adriatic against apuglia apulia blue boot can castro cave caves coast eerie europe formation four grotta grotto heel heritage historical history holiday inside italian italy landscape limestone nature near ocean otranto peninsula people person puglia rock salento scenery scenic sea seen shadows sky south southern stone tourism tourist travel vacation view walls water zinzulusa