Inishbofin is one of the few places in Ireland where a Blowhole can be seen. In geology, a blowhole is formed as sea caves grow landwards and upwards into vertical shafts and expose themselves towards the surface

Sea stacks can be viewed at the Stags of Inishbofin. A stack is a geological landform consisting of a steep and often vertical column or columns of rock in the sea near a coast, isolated by erosion

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