Sea waves gently splash against concrete cubical structures erected along the shore to prevent erosion, situated in Spain

sea waves splashing cubical concrete shore erosion protection spain coastal sea waves concrete structures erosion prevention coastal protection shoreline ocean marine coast seaside spanish coast waterfront erosion control shoreline protection coastal construction seafront beach marine engineering shoreline defense seafront protection shoreline management coastline barrier infrastructure engineering environment development conservation resilience stability management coastal environment defense construction structure area coastline defense sunshine dusk sea walk tranquil peacefull