Mona Lisa, Louvre Museum, Paris

While spectators are captivated by Mona Lisa’s enigmatic smile and gaze that follows you around the gallery, Renaissance master artist Leonardo da Vinci also painted the horizon behind her at eye level to draw viewers in. The priceless oil on wood portrait was kept by King Francois I, King Louis XIV and Napoleon before the French government declared her a public treasure; today, she has her own fan mailbox at the Louvre. #themeparks