Medellín is a beautiful, friendly city in Colombia with great weather and people. The document recommends visiting popular sites like Pueblito Paisa and the subway, which are inexpensive. It suggests wearing tennis shoes at Pueblito Paisa to walk around and bringing a camera to remember the holiday. Some activities mentioned include eating local food, visiting parks, seeing Christmas lights in December, and riding the beautiful, modern subway system. Overall, the document portrays Medellín as a great place for an affordable holiday.