สหรัฐอเมริกา, โอเรกอน, เนินเขาทาสี, ธรรมชาติ, ภูมิประเทศ, ภูเขา, ธรณีวิทยา, อนุสาวรีย์แห่งชาติ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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