Fort Casey State Park is located on Whidbey Island in Washington State. It was established in the late 19th century as part of the coastal defense system. The park features historic military structures, including the large coastal artillery batteries, which were used during World War II. Visitors can explore the remnants of these fortifications and enjoy scenic views of the surrounding waters. The park also offers various recreational activities, such as hiking, picnicking, and beach access. With its lush landscapes and rich history, Fort Casey State Park is a popular destination for both locals and tourists looking to experience the natural beauty and heritage of the area.