North Bull Island

North Bull Island is a remarkable 5km-long, 800m-wide island in Dublin Bay, representing Ireland's most designated conservation site and the heart of the Dublin Bay UNESCO Biosphere Reserve. Located parallel to the shore off Clontarf, Raheny, and Kilbarrack, this dynamic island developed as a consequence of the North Bull Wall construction and continues to grow through sand accretion - the only dunes on Ireland's east coast still expanding. Designated as Ireland's first UNESCO Biosphere Reserve in 1981, North Bull Island was instrumental in the entire Dublin Bay achieving UNESCO Biosphere status in 2015, creating the only Biosphere Reserve entirely within a capital city worldwide.