There are 28 Farne Islands in all, situated between 2-5 miles off the coast of Bamburgh. They exist because the resistant volcanic rock (dolerite), of which they are made, has proved to be a match for the relentless pounding waves of the North Sea. The islands are in the care of the National Trust, and are a very popular destination for lovers of wildlife. Nowhere in the British Isles can such a variety of sea birds can be found in such a small area. A trip to the islands is an enjoyable experience. Another risident of the islands is the Grey Seal and the colony here is one of the most important in Europe. This species of seal is the rarest in the world and is the largest surviving carnivore in the British Isles. Historically the Farne Islands are associated with St. Aiden and St. Cuthbert, both of whom used the islands as a place to meditate in utter solitude. Also, the Northumberland heroine Grace Darling spent most of her shore life in lighthouses here, first on Brownsman and then on Longstone. The Farne Islands can be reached via a half hour boat trip from Seahouses.