boardwalk

A boardwalk (alternatively board walk, boarded path, or promenade) is an elevated footpath, walkway, or causeway built with wooden planks that enables pedestrians to cross wet, fragile, or marshy land. They are also in effect a low type of bridge. Such timber trackways have existed since at least Neolithic times.
Some wood boardwalks have had sections replaced by concrete and even "a type of recycled plastic that looks like wood."

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