phosphorous cave in the cliffs of southwestern coast of cennet island in marmaris, turkey

phosphorous cennet dilek paradise island rock rocky sediment sea coastal serene hidden geological phosphor marmaris tourism mugla aegean mediterranean turkiye turkey turkish middle east caving underground subterranean cavern nature natural void grotto speleology limestone landscape hole tunnel geologic mystery coastline coast cliff lagoon turquoise seaside scenery seashore erosion attraction travel