This image is of an upturned boat-shed on Holy Island in Northumberland. Herring keelboats were often used for storage in this way after their time at sea had come to an end and several examples of this traditional practice (including this one) can be seen around Holy Island harbour. The edge of the harbour is in the mid-ground - overlooked by the ever present Lindisfarne castle.
Thanks for all the C&C's on my last castle upload.
Best wishes and happy easter,
Landscape and travel
Holy island harbour