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In page Achill Island:

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The cliffs of Croaghaun on the western end of the island are the third highest sea cliffs in Europe but are inaccessible by road. Near the westernmost point of Achill, Achill Head, is Keem Bay. Keel Beach is visited by tourists and used as a surfing location.[citation needed] South of Keem beach is Moytoge Head, which with its rounded appearance drops dramatically down to the ocean. An old British observation post, built during World War I to prevent the Germans from landing arms for the Irish Republican Army, still stands on Moytoge. During the Emergency (WWII), this post was rebuilt by the Irish Defence Forces as a lookout post for the Coast Watching Service wing of the Defence Forces. It operated from 1939 to 1945.[1]