stranges s of soil erosion

amaze amazing ancient arid asia beautiful beauty blue brown canyon cave chimney clay cliff color cones conical conservation day desert dry eroded erosion formation geological geology grand ground heat hill history horizontal image lalu land landscape limestone loss majestic miraculous mount mountain national nature old outdoor park pattern phrae pillar rain red rock runoff sand sandstone scene sky soil stone strange sunlight terrain thai thailand tourism travel trekking trip valley water weathering wonderful yellow