Boardwalks are a great way to cross over portions of wetland/marsh areas in order to reach your dock or the shoreline. Dune walkovers accomplish a similar goal by allowing you to walk over sand dunes on the beach in order to get to the waterfront.
Both of these types of structures are pretty much the same as building a dock except it's on land. That means you have all of the same decking and style choices as building a dock.
Check out some of our boardwalks/dune walkovers photos below: