น้ำตก, เขื่อนกั้นน้ำ, กระแส, น้ำ, ไหล, แม่น้ำ, ป่า, ธรรมชาติ, กรวด, โขดหิน, หิน
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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