Mersea Island is located off the coast of Essex, England, and is known for its scenic beauty and rich history. It is the most easterly inhabited island in the United Kingdom, connected to the mainland by a causeway that is submerged at high tide. The island covers approximately 3.5 square miles and features a mix of farmland, beaches, and salt marshes. The island is famous for its seafood, particularly its Mersea Island oysters, which are harvested from the surrounding waters. Visitors can enjoy various outdoor activities, including walking, cycling, and birdwatching, making it a popular destination for nature lovers and tourists alike.