Cartagena's colonial walled city and fortress were designated a UNESCO World Heritage Site in 1984.
"The Castillo San Felipe, originally built in the 16th century and rebuilt in the mid-17th century, was so strong and so well located, on top of the San Lázaro Hill, that is was never taken. There were plenty of attempts, heavy battles, but in the end, the defenders always prevailed. The most famous battle was the one waged by the English admiral Edward Vernon in 1741. The British were so convinced of their victory against the Spanish, based on their much larger numbers of ship, cannons and men, that they even minted coints depicting a humiliated Blas de Lezo kneeling before Vernon. In reality, however, the Brits were defeated, and the physically handicapped Blas de Lezo, missing a leg, an arm and an eye, turned into a hero. He is still visible as a statue at the foot of the San Lázaro hill on which the fortress is built. Copies of the British coins depicting his defeat are attached to the sides of the pedestal on which his statue stands." - in: www.traveladventures.org/continents/southamerica/castillo-san-felipe/shtml