Day 11 of my Normandy Advent calendar showcases the island of Tatihou. It's located off the Cotentin coast near St Vaast La Hougue. If the tide is very low you can walk to the island following a certain route. Otherwise you can take the amphibious craft to cross both the sea and land which takes around 5 minutes. There's a museum, fort, tower and barracks to explore once you're on the island.
Posted by Chris at Normandy Gite Holidays