Take a trip back to World War II at Fort Miles inside Cape Henlopen State Park, where massive artillery, underground bunkers, and fascinating military history bring the past to life. From towering 16-inch shells to live artillery demonstrations that let visitors “hear the big boom,” this hidden Delaware landmark offers an unforgettable look at one of the nation’s former coastal defense sites. Explore historic barracks, museum exhibits, and interactive tours while discovering the stories behind the top-secret operation that once protected the Delaware Bay. Whether you’re a history buff or just looking for a unique day trip, Fort Miles delivers an experience that’s both educational and explosive.