How (And Why) to Build a Dune In one Jersey Shore community, the sand stood up to Sandy. By Jen A. Miller, in South Seaside Park, New Jersey, for National Geographic PUBLISHED Sun Sep 01 01:11:00 EDT 2013 0 Temporary dunes were built to protect homes in Ortley Beach, New Jersey after Superstorm Sandy. Photgraph by Lucas Jackson, Reuters A dune in the right place at the right time is a very powerful thing. More than just hills of sand, dunes can be a beach town's first line of defense against storms and erosion. That's why some coastal communities are encouraging their growth. Related Stories Ancient Script Spurs Rethinking of Historic ‘Backwater’ Here Are the Ancient Sites ISIS Has Damaged and Destroyed 10 Years After Katrina, Some Are 'Homeless in Their Own Homes'