San Felipe de Barajas Fort, located in Cartagena, Colombia, is a must-see historical site showcasing Spanish colonial military architecture. It is easily accessible from Cartagena's city center, a short taxi or bus ride away. Visiting solo is feasible, though guided tours, available in multiple languages, can provide enriching historical context and are worth considering. The fort is open year-round, but plan your visit between December and March to avoid the rainy season. Entrance fees are modest, typically less than $10 USD per person. Allocate around 1.5 to 2 hours to thoroughly explore its extensive tunnels and vantage points, offering panoramic views of Cartagena. Wear comfortable shoes, bring sunscreen, and water, as the area can get hot and sunny.