From Wiki:

Lindisfarne Castle is a 16th-century castle located on Holy Island, near Berwick-upon-Tweed, Northumberland, England, much altered by Sir Edwin Lutyens in 1901. The island is accessible from the mainland at low tide by means of a causeway.

The castle is located in what was once the very volatile border area between England and Scotland. Not only did the English and Scots fight, but the area was frequently attacked by Vikings. The castle was built in 1550, around the time that Lindisfarne Priory went out of use, and stones from the priory were used as building material. It is very small by the usual standards, and was more of a fort. The castle sits on the highest point of the island, a whinstone hill called Beblowe.

Lindisfarne’s position in the North Sea made it vulnerable to attack from Scots and Norsemen, and by Tudor times it was clear there was a need for a stronger fortification, although obviously, by this time, the Norsemen were no longer a danger. This resulted in the creation of the fort on Beblowe Crag between 1570 and 1572 which forms the basis of the present castle.

I am now going to continue with the places that I visited on last years vacation to Newcastle and Crookham.  First port of call is the Holy Island of Lindisfarne.  The Island is tidal and can only be accessed by a causeway that twice a day is covered by the North Sea.  A journey there has to be planned carefully to avoid the tides.

Lindisfarne is internationally famous both for its medieval religious heritage and also its more recent picturesque 16th century castle. These, together with most of the community, are located on the Southern part of the island – the main focus for tourists and holidaymakers. Many are also attracted by the peace and tranquility which pervades the Island and the remote Northern conservation area, with more than its fair share of quiet beaches and unique natural history.