Stepping stones
Stepping stones or step stones are sets of stones arranged to form a simple bridge or causeway that allows a pedestrian to cross a natural watercourse, such as a river; or a water feature in a garden where water is allowed to flow between stone steps. Unlike other bridges, they have no spans. Although their origin is unknown, stepping stones, along with log bridges, are likely to have been one of the earliest forms of crossing inland bodies of water devised by humans.
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