excursionoahu observatory tourShare on FacebookShare on Twitter471IMAGESW. M. Keck Observatory, Hawaii, United StatesSky, blue sky, observatory and cloud HD photo by Jakob Owens50-Minute Oahu Helicopter Tour【K】USA Travel-Oahu[미국 여행-오하우]분화구의 반짝이는 암석, 다이아몬드 헤드/Diamond Head/Observatory/CraterHike Oahu’s Historic Diamond Head & Visit the New Visitor CenterHaleakala Observatory Haleakala, 10 Anniversary, Oahu, Seattle Skyline
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