the basalt columns in tongpan (桶盤) island, penghu county, taiwan

asia asian attraction basalt basaltic blue cactus cliff column columnar ecotour ecotourism famous geological geology geopark hill igneous island islet landform landscape lava magmatic magong mesa natural nature outdoor panorama panoramic park penghu rock rough scene scenery scenic sightseeing sky stone taiwan tongpan tongpanyu tourism touristic travel view village volcanic 台湾 台灣 澎湖 澎湖島 桶盤 桶盤嶼