natural arch bridge carved by wave action on the cantabrian coast

sea stack urros canto del diablo puerta urro manzano liencres costa quebrada rock formations arch bridge gate landform ocean landscape rocky coastline scenic scenery seascape natural cliff monolith baselga pielagos bay biscay cantabrian coast atlantic cantabria santander spain europe coastal erosion wave action carved abrasion platform wavecut geological marlstone limestone nature outdoors travel opening sea northern