Teignmouth Pier and coastal defences at Teignmouth, South Devon, England, United Kingdom, Europe

Stone harbour wall and village of Lynmouth on a summer morning, Exmoor National Park, Devon, England, United Kingdom, Europe

Weathered wooden coastal defences on Bossington Beach, Exmoor National Park, Somerset, England, United Kingdom, Europe

Fort McClary State Historic Site, Kittery, Kittery Point, Maine, New England, United States of America, North America

Fort St. Catherine, UNESCO World Heritage Site, Bermuda, Central America

Elevated view of harbour, Dalt Vila district and city defence walls at dusk, UNESCO World Heritage Site, Ibiza Town, Eivissa, Balearic Islands, Spain, Mediterranean, Europe

Fort Grey Shipwreck Museum, Saint Pierre du Bois, Guernsey, Channel Islands, United Kingdom, Europe

Couple with elevated view of harbour, Dalt Vila district and city defence walls, UNESCO World Heritage Site, Ibiza Town, Eivissa, Balearic Islands, Spain, Mediterranean, Europe

Sea defence made from Queen Coch shells, South Water Cay, Belize (rr)

Sea defence made from Queen Coch shells, South Water Cay, Belize (rr)

Sea defence made from Queen Coch shells, South Water Cay, Belize (rr)

Jetty and sea defence made from Queen Coch shells, South Water Cay, Belize

Beach, Torre della Pelosa, coastal defence tower, Stintino, Sardinia, Italy, Europe

View from the fortress Spanjola on town Hvar, island of Hvar, Split-Dalmatia, Croatia, Europe

View with historic Aragonese castle, Otranto, Apulia, Italy, Europe

Sandbags in rows at the water's edge to prevent erosion of the beach

Sandbags in rows at the water's edge to prevent erosion of the beach

Sandbags in rows at the water's edge to prevent erosion of the beach