Background material of pebbles and gravel visible from the transparent river surface

प्रकृति-लैंडस्केप / Background material of pebbles and gravel visible from the transparent river surface
परिस्थितिकी / Background material of pebbles and gravel visible from the transparent river surface
बनावट-पृष्ठभूमि / Background material of pebbles and gravel visible from the transparent river surface