น้ำตก, แม่น้ำ, ธนาคาร, ป่า, เขื่อนกั้นน้ำ, ธรรมชาติ, พลังงานน้ำ, เชิงเขาอัลไพน์, คลื่น, น้ำ, ท้องฟ้า
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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