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Hy-Brasil, the Phantom Island

PlacesNorth Atlantic, west of Ireland · On maps from 1325Never existed

For centuries, maps showed a round island off the west coast of Ireland that no one could find.

What was reported

Hy-Brasil, from the Irish Í Bhreasail, appeared on maps from 1325 as a round island, often split by a channel, in the Atlantic west of Ireland. Irish legends said it was hidden in mist and could be seen only once every seven years.

It stayed on some charts into the 1800s, and there were stories of sightings and even of landings.

Explanations offered

There's no island there, only deep ocean, though a shallower area called the Porcupine Bank lies to the west. The island probably came from legend and from mapmakers copying each other's mistakes, helped by mirages and cloud banks on the horizon.

When
On maps from 1325
Where
North Atlantic, west of Ireland
Witnesses
Mapmakers and sailors
Status
Never existed

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