Intense double rainbow arcing over Doe Castle and the sands of Sheephaven Bay in Donegal on Ireland's Wild Atlantic Way.

Doe Castle dates to the 1420s and was home of the McSweeneys, a clan originally from Scotland who came to Ireland as mercenary fighters known as gallowglasses.

The name Doe Castle is an anglicisation of Caisleán na dTuath which means castle of the area or district - a túath being an administrative area in Gaelic Ireland.

The tower itself is 15th century but the outer enclosing walls, the bawn, date to the 17th century.