The North West Rapid Coastal Zone Assessment field survey of south Cumbria recorded the remains of 11 prehistoric sites, three Roman sites, 15 medieval sites, 16 post-medieval sites and 31 20th century sites. These sites include a stone circle, eroding faunal remains, excavated prehistoric occupation sites, lithic scatters, a Roman fort and bath house, two medieval castles, three decorated cross shafts, three possible medieval fishtraps, a possible medieval cist, stone-built and timber quaysides and jetties, a limekiln, a copper mine, First World War trenches and Second World War firing ranges and coastal defence batteries. There is a wealth of significant heritage sites along the coast in this region, many of which are accessible on the Cumbria Coastal Way footpath and around the margins of Morecambe Bay.
Of all the sites at risk, the most at risk and most significant sites are the possible prehistoric faunal remains at Walney Island, the possible prehistoric burnt mounds, or hearths, at Drigg, the Roman fort at Ravenglass, the medieval motte and bailey castle at Aldingham and the medieval fish traps at Nethertown and St Bees. These remains face various different types of threat, but all are difficult, if not impossible, to protect from erosion and all will be destroyed within the next 100 years, under current predictions of shoreline change.