Wales, Dyfed, Coastline, Green Bridge of Wales natural coastal rock arch near St Govans Head formed by erosion from waves.

Fortification built on the end of Hurst Spit at the narrowest point of the Solent, opposite the Isle of Wight guarding the approaches to Southampton Port and Portsmouth harbour. First fort completed i...

Ireland, County Clare, The Burren, Clint blocks of limestone and gryke or grike fissures leading to a rock boulder split in two by erosion.

Ireland, County Clare, The Burren, Clint blocks of limestone and gryke or grike fissures leading to a rock boulder split in two by erosion.

Ireland, County Mayo, Downpatrick Head, Dun Briste or Broken Fort is an impressive sea stack at the headland.

England, Dorset, Limestone cliffs adjacent to Durdle Door.

England, Dorset, Durdle Door, Close up of limestone arch on the Jurassic Coast.

England, Dorset, Durdle Door, Steps leading down to the beach and the arch.

England, Dorset, Durdle Door, Limestone arch on the Jurassic Coast.

England, Dorset, Durdle Door, Steps leading down to the beach and the arch.

England, East Sussex, Eastbourne, Beachy Head Lighthouse.

France, Brittany, Les Tas de Pois, Pile of Peas, islets off the Pointe de Pen-Hir on the Presqu'ile de Crozon.