Cartagena Walled City Walking Tour 2026: UNESCO Historic Center Key Takeaways UNESCO Heritage Perfection: The Walled City encompasses 1.5 square kilometers of impeccably preserved 16th-18th century Spanish colonial architecture, featuring 13 kilometers of defensive fortifications protecting cobblestone streets, baroque churches, and pastel-colored mansions with bougainvillea-draped balconies. Self-Guided Excellence: The compact historic center […]