The Castillo de San Felipe de Barajas is a historic fortress located in Cartagena, Colombia, perched atop the Hill of San Lázaro. Built in 1639 during the Spanish colonial era, it is renowned as one of the greatest military fortifications constructed by the Spaniards. Visitors can explore its maze-like corridors, climb its massive stone walls, and take in panoramic views of Cartagena. The fortress also offers guided tours that delve into its fascinating history, including its role in defending the city from invasions.