Young Red Haired Girl Outside In The Nature At The Pond

Pond usually implies a quite small body of water, generally smaller than one would require a boat to cross. Another definition is that a pond is a body of water where even its deepest areas are reached by sunlight or where a human can walk across the entire body of water without being submerged. In some dialects of English, pond normally refers to small artificially created bodies of water.
Some regions of the United States define a pond as a body of water with a surface area of less than 10 acres (40,000 m²).
Regional differences include the use of the word pond in New England, and Maine in particular, for relatively large water bodies. For example a Great Pond in Maine is considered to be at least 10 acres (41,240 m²) in area.
In areas which were covered by glaciers in the past, some ponds were created when the glaciers retreated. These ponds are known as kettle ponds. Walden Pond in Concord, Massachusetts, is a well known example. Kettle ponds are usually quite deep and clean because they are fed by underground aquifers rather than surface streams.