underwater wiki:
>For other uses of the word underwater, see Underwater (disambiguation) Underwater, sometimes shortened as U/W, is a term describing the realm below the surface of water where the water exists in a natural feature (called a body of water) such as an ocean, sea, lake, pond, or river. Three quarters of the planet earth is covered by water. A majority of the planet's solid surface is abyssal plain, at depths between 4000 and 5500 m (13,000 to 18,000 ft) below the surface of the oceans. The solid surface location on the planet closest to the center of the orb is the Challenger Deep, located in the Mariana Trench at a depth of 10,924 m (35,838 ft) under the sea.
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landscape wiki:
ean:The layout of a land area, particularly with respect to its appearance and character. A landscape includes such elements as landforms, bodies of water, flora and fauna, and lighting and weather conditions (the natural elements), as well as human presence and human-built elements (the cultural elements or built environment). See also Landscape Architecture, Landscape Ecology and Landscape Engineering, Landscape Planning, Landscape Design.
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