Reflection of the castle in the surface of the waterReflection of the castle in the surface of the water
A floating flock of dolphins above the surface of the waterA floating flock of dolphins above the surface of the water
The surface of the ancient pond was covered with brown mudThe surface of the ancient pond was covered with brown mud
Reflection of a watermill on the surface of the water in the eveningReflection of a watermill on the surface of the water in the evening
Macro shooting. textured blue surface. frozen dropletsMacro shooting. Textured blue surface. Frozen droplets
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..