Flowers on the surface of the lake. Flower, reed and freshwater plants cover the surface of the lake. Flowered natural lake. Dense vegetation in the lake. Untouched, intact natural habitat and ecosystem. A lake is an area filled with water, localized in a basin, that is surrounded by land, apart from any river or other outlet that serves to feed or drain the lake. Most lakes are fed and drained by rivers and streams. Standing bodies of water such as puddle, pond, lake are often categorized separately from flowing water courses, such as brook, creek, stream or river. 4K UHD 3840×2160 30p.