Siena is a medieval city and a UNESCO World Heritage site. The core is the Piazza del Campo (shell-shaped, venue of the Palio horse race). Climb the Torre del Mangia for a panoramic view of the city. Visit Siena Cathedral (a Gothic masterpiece in black and white marble). Must-try local foods include Pici pasta, wild boar dishes, Ricciarelli (almond cookies), and Panforte (fruit cake).