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A landmark is a recognizable natural or man-made feature used for navigation, a feature that stands out from its near environment and is often visible from long distances.

In modern use, the term can also be applied to smaller structures or features, that have become local or national symbols.

Landmarks are usually classified as either natural landmarks or man-made landmarks, both are originally used to support navigation on finding directions. A variant is a seamark or day mark, a structure usually built intentionally to aid sailors navigating featureless coasts.