Just off the coast of Normandy, France, lies Jersey, a British island with a Norse name. Found on the southeastern shore of the island is La Rocque Harbour, home to a white, sandy beach and an elevated walkway that stretches out into the water. The shoreline's granite and plutonic rocks, which originated more than 420 million years ago, showcase a variety of colours and textures. Visible from the harbour are the round, stubby Icho Tower and the taller Seymour Tower, built in the 18th and 19th centuries, respectively, as coastal defence structures. Both structures are over 548 metres away from the shore and can be reached on foot with a sturdy pair of shoes, but only on the days of the year where the tide is lowest.