Castillo San Felipe de Barajas is not and was never a castle. It was actually a fort masquerading as a castle. With 53 canons and massive walls – this was not a place for fairy tales. The fort, which took 104 years to build, was created to defend an attack from the North and East. However, today it’s a major landmark of the city which has a lovely view of the city and provides a glimpse into Cartagena's colonial history. Wander through the tunnel system and be sure to take aim with one of the big canons!