A floating flock of dolphins above the surface of the waterA floating flock of dolphins above the surface of the water
Lighthouse surrounded by a smooth surface of waterLighthouse surrounded by a smooth surface of water
Trees in autumn attire, reflected in the surface of the lake in clear and windless weatherTrees in autumn attire, reflected in the surface of the lake in clear and windless weather
Macro shooting. textured blue surface. frozen dropletsMacro shooting. Textured blue surface. Frozen droplets
The reflection of the mountains in the mirror surface of the lakeThe reflection of the mountains in the mirror surface of the lake
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..