Saumarez Park is the largest public park on the island of Guernsey. The park, one of the island's main social venues, is located in the Parish of Castel, about 4 km from the centre of Saint Peter Port. It contains various facilities, including the National Trust of Guernsey's Folk & Costume Museum, a cafe, a large children's playground, large open grass law…Saumarez Park is the largest public park on the island of Guernsey. The park, one of the island's main social venues, is located in the Parish of Castel, about 4 km from the centre of Saint Peter Port. It contains various facilities, including the National Trust of Guernsey's Folk & Costume Museum, a cafe, a large children's playground, large open grass lawns and a duck pond. A nature trail links the park with nearby Cobo Bay on the north shore of the island.