One of Ireland's most famous sights, the Cliffs of Moher (Aillte an Mothair, or Ailltreacha Mothair) rise to a height of 214m (702ft). They are entirely vertical and the cliff edge is abrupt. Where access is permitted there's a protecting wall. On a clear day the views are tremendous, with the Aran Islands etched on the waters of Galway Bay.
From the cliff edge you can just hear the booming far below as the waves crash and gnaw at the soft shale and sandstone. Sections of the cliff often give way, and they're generally so unstable that few birds or plants make them their home. With a due-west exposure, sunset is the best time to visit - many of the tourist buses will have left by then too.