light from above - gaping gill cave

above abyss blue britain british cave caving climb climbing cold dale dales dark darkness deep depth descending descent england english enlightenment entry equipment gaping geologic geology gill god granite great hole ingleborough inside jesus kingdom landscape landscapes light mineral mountain mountains national natural nature north panorama park ray rays religion religious river rock rocks rocky safe safety shine speleologist speleology spiritual spirituality stone stones sun the underground united wall walls water waterfall waterfalls yorkshire