Lindisfarne / Holy Island this is the causeway, the only way on and off!
Dramatically perched on a rocky crag and accessible via a three-mile causeway at low tide only, the island castle presents an exciting and alluring aspect. Originally a Tudor fort, it was converted into a private house in 1903 by the young Edwin Lutyens. The small rooms are full of intimate decoration and design, with windows looking down upon the charming walled garden planned by Gertrude Jekyll. The property also has several extremely well-preserved 19th-century lime kilns.
http://www.nationaltrust.org.uk/main/w-vh/w-visits/w-findaplace/w-lindisfarnecastle/
http://www.lindisfarne.org.uk/