Panorama of High Island reservoir East Dam in Hong Kong, aerial

high island reservoir east dam reservoir aerial shot geopark high island geological formation sea island natural wonder water landmass china nature conservation landscape unspoiled panorama hong kong place sain kung vessel shore scenery destination speedboat pristine beache location scene view white sandy beach boat concrete sharp peak back garden of hong kong volcanic eruption dolosse block country park rock formed rural area southeastern stone beach hexagonal columns park sand protected outdoors iconic