interior of a cave of drogarati at sami of kefalonia island

cave drogarati kefalonia cefalonia greece sami greek travel nature europe rock shape island mediterranean geology roof geological underground stalactite cavern ionian touristic stalagmite walls speleology cephalonia nymphs formation float cefallonia destination dhrogariti drogariti drogharati extreme hole ionio ionion kefalinia kefallinia kefallonia panas samy spectacle stalactic