Elizabeth Castle is a historic fortress located on a small island in St. Aubin's Bay, Jersey, one of the Channel Islands. Built in the 16th century, it was named after Queen Elizabeth I and served as a defense against invasions. The castle features a mix of architectural styles, reflecting its long history and various renovations. Visitors can access the castle by a causeway during low tide or by boat. Inside, there are several buildings, including a chapel and barracks, along with stunning views of the surrounding sea. Elizabeth Castle is a popular tourist attraction, offering insights into Jersey's military history.