Perched high on Vomero hill, Castel Sant'Elmo offers a breathtaking 360-degree view of Naples and the bay. This massive, star-shaped fortress provides an unforgettable panorama stretching from the historic center to Vesuvius and the islands. Access is possible by a climb or a funicular, which is a five-minute walk from the entrance. It's recommended to spend a couple of hours on the ramparts, especially during sunset.