The Walls of Cartagena de Indias are one of the main symbols of the city and one of the most impressive colonial fortifications in Latin America. Declared a World Heritage Site by UNESCO in 1984, these walls not only have unparalleled historical value, but also offer spectacular views of the Caribbean and the city.

The walls were built by the Spanish between the 16th and 18th centuries to protect the city from attacks by pirates and foreign enemies. Cartagena de Indias was a key port for Spain's trade in the Caribbean, especially in the slave trade and in the transport of gold and silver from the colonies to Europe. Because of this, it was the target of frequent attacks, including the famous siege of the English pirate Sir Francis Drake in 1586.

After Drake's attack, the Spanish reinforced the city's defenses, and thus began the construction of the city walls. Italian military engineer Battista Antonelli was one of the first to design the fortification system. However, the construction was a long and difficult process, which lasted more than 200 years, due to the complexity of the terrain and the constant threat of attacks.

The walls surround much of the walled city, a section of Cartagena's historic center that is filled with colonial architecture, churches, plazas and cobblestone streets. The defense system is complemented by several bastions, forts and bastions, such as the Baluarte de Santo Domingo, the Baluarte de San Francisco Javier, and the Fuerte de San Felipe de Barajas.

The walls are mainly built with coral and rock, materials that were abundant in the region and that gave them great durability against the elements of the Caribbean. The thickness of the walls varies between 11 and 18 meters, and their height can reach 10 meters at some points.

Their main function was to defend the city from the constant attacks of pirates and corsairs, as well as enemy powers such as England and France. Cartagena, due to its strategic location, was one of the main trading points of the Spanish Empire, so the defenses were crucial for the safety of the resources that passed through the city.

In addition to the walls, Cartagena had a system of exterior fortifications that included forts and batteries to protect the entrance to the bay, such as the Fort of San Fernando de Bocachica, located at the southern entrance to the Bay of Cartagena.

Today, the walls are one of Cartagena's main tourist attractions. They can be explored on foot, providing spectacular views of both the historic center and the Caribbean Sea. Along the walls, there are points of interest that tell the history of the city, as well as cannons that still remain in place, recalling the times when Cartagena had to defend itself from invaders.

The conservation of the walls has been an ongoing effort, and their preservation is essential to maintain the historical and cultural identity of the city. The walls are not only an architectural marvel, but also a testimony of the colonial past and the battles that shaped the Caribbean.

- Cartagena de Indias is one of the few remaining walled cities in the Americas.
- The construction of the walls was affected by several factors, including the constant pirate attacks and the geographical difficulties of the terrain, which prolonged its construction.
- At some points along the walls, such as the Baluarte de Santo Domingo, there are cafes and restaurants where tourists can enjoy the view while relaxing.

In short, the walls of Cartagena not only represent the military defense of a key city for the Spanish Empire, but also the very essence of Latin America's colonial history.