Mark Taylor / Waves breaking against sea wall and cliffs, Seaford, Sussex, England, UK, 15th February 2014.

David Woodfall / Waves crashing against the sea wall with a coast guard walking along it, Rhyl, Wales. January.

Dave Bevan / Flock of Turnstones (Arenaria interpres) feeding on a sea wall, disturbed by a runner, Devon, England, UK, January

Dave Bevan / Flock of Turnstones (Arenaria interpres) feeding on a sea wall, Devon, England, UK, January

Ernie Janes / Sea wall and housing vulnerable to flooding around The Wash, Snettisham, Norfolk, England, UK, February 2015.

Ernie Janes / Sea wall and housing vulnerable to flooding around The Wash, Snettisham, Norfolk, England, UK, February 2015.

Jean E. Roche / Dyke restored to protect Salin de Giraud saltpans from sea, Camargue, France, February.

Ernie Janes / Repairs to Cromer sea wall after the tidal surge in December 2013, Norfolk, England, UK. January 2015.

Christophe Courteau / Spring tide waves at Saint-Malo, Ille-et-Vilaine, Brittany, France. February 2014.

Loic Poidevin / Waves crashing at harbor entrance during storm. Prieur Saint Nicolas, Les Sables d' Olonne, Vendee, France, March 2014.

Charlie Summers / Four black-legged kittiwakes (Rissa tridactyla) resting on sea wall at Stromness, Orkney Islands, Scotland, UK, July.

Ernie Janes / View of coastal sea defences, Walcott, Norfolk, England, UK, February.

Doug Gimesy / Silver gull (Chroicocephalus novaehollandiae) juvenile, standing on sea wall, Port Philip Bay, Sandringham, Victoria, Australia.

Terry Whittaker / Sand martins (Riparia riparia) flying to and from their nests in old drainage pipes along River Mersey retaining walls. Greater Manchester, UK.

Matthew Maran / Sea Wall at sunset New Forest National Park, Hampshire, England, UK. August 2018.

Terry Whittaker / Sand martins (Riparia riparia) returning to chicks in nest located in old drainage pipes along River Mersey retaining walls, Greater Manchester, UK.

Terry Whittaker / Pair of Sand martins (Riparia riparia) returning to chicks at nest located in old drainage pipes along River Mersey retaining walls, Greater Manchester, UK.

Nigel Cattlin / Irrigation canals and newly repaired mud irrigation levies channeling water to paddy rice crops in ear, Luzon, Philippines