Parco Sempione is Milan's largest park, a lush green oasis near Castello Sforzesco. Built in the late 19th century to mimic English gardens, it covers over 47 hectares and features a picturesque artificial lake, charming buildings like La Triennale and the Civic Aquarium, and the iconic Arco della Pace. Locals and tourists flock here to soak up the sun, relax on the grass, and enjoy a peaceful escape in the heart of the city. It's the perfect spot for a leisurely stroll or a picnic with friends.