The castle at Mont Orgueil, in Gorey, Jersey, dates back to the early 1200s. This is a popular place for tourists, and locals to visit. It is often referred to as Gorey Castle, by the locals.
Gorey is on the east coast of Jersey, and there are many buses running there from St. Helier - route no. 1.
Below are some photos of Mont Orgueil.
More information on the castle, and its history: Wikipedia