So you’re visiting Medellín for a while. You saw the Christmas lights. You stared into the night sky at Plaza de la Luz, rode the San Javier open air escalators, and toured four or five of the Parque Bibliotecas. You rode the metrocable to Mazaanti’s Parque Biblioteca España and hiked Parque Arví. You’ve done it all. Now you’re ready to experience more of the city, a town former Mayor Luis Perez called “an urban poem.” Here are three parks, three...