Almost every Peruvian city or town, no matter how small, has a main square, usually called the Plaza de Armas. Cuzco’s is the center of the city in every sense, and in the time of the Incas, was connected to Plaza Regocijo. The square’s a beautiful place to stroll. While you’re there, visit the cathedral, known for paintings by native artists trained in what is referred to as the Escuela Cuzqueña, or Cuzco School of Art. Of particular note is a distinctly Peruvian depiction of the Last Supper—with a guinea pig as the main dish.