Ireland, County Sligo, Patterns in the sand on Lissadell Beach.

Ireland, County Clare, Rocky shoreline at Black Head with small stack of rocks constructed by tourists.

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.

Ireland, County Clare, Cliffs of Moher with O'Briens Tower.

Ireland, County Sligo, Ben Bulben mountain with Rosses Point 3rd beach in the foreground on a clear winters day.

Ireland, County Sligo, Ben Bulben mountain with Rosses Point 3rd beach in the foreground.

Ireland, County Sligo, Knocknarea Mountain seen from Lissadell Beach.

Ireland, County Mayo, Erris Head, Erris Head Loop Walk, view of cliffs and sea.

France, Alpes-Maritimes, Eze, Hilltop town and coastline beyond.

Republic of Ireland, County Wexford, Hook Head Lighthouse which is one of the world's oldest lighthouses.