Umfin (Umphin, Iompainn) is an uninhabited island living 3km west of Gweedore in Western Donegal
How to swim through an island.
Living below and running through the island is a 300 metre long tidal sea tunnel. The tunnel starts on the landward side of the island in at a very sheltered sea cave
Arrive on Umfin
Start of the swim
Exit the light
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