cave rock tunnel through rock formation

039 abstract alicante asup3 background blanca brown calp calpe cave cavern chain cliff corridor costa danger dark diminishing dungeon empty entrance escape espana excavation exit formation geology gloomy handrail ifac ifach inside iron leading mineral mountain natural nature nobody old park path pathway peaplusmn penyal people perspective peñón rock rocky rough spain spanish stone stony subterranean sunlight surface texture tunnel vanishing walk wall way