Reflection of the forest and mountains in the surface of the lakeReflection of the forest and mountains in the surface of the lake
Lake surface against the background of autumn colorsLake surface against the background of autumn colors
The mirror surface of the lake reflects the sky, mountain peaks and treesThe mirror surface of the lake reflects the sky, mountain peaks and trees
The water surface of the sea in turquoise-blue colorsThe water surface of the sea in turquoise-blue colors
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..