แม่น้ำ, การท่องเที่ยว, การสำรวจ, ธรรมชาติ, ความเป็นป่า, น้ำเชี่ยว, หมอก, ห้วย, กระแส, ตอนต้น, ต้นไม้
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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