Castillo San Felipe de Barajas

Feel the heat rising from the stone beneath your feet. It is warm even in the early morning, and by noon it seems to breathe. Above you, grey walls climb the hillside in steep, angled layers. The wind comes in from the Caribbean, carrying salt and the faint noise of traffic below. Somewhere a seabird calls. This is Castillo San Felipe de Barajas, and you are standing on the hill that guarded Cartagena for centuries.

Before we climb, take a moment to look at the shape of the place. This is not a castle of towers and pointed roofs. It is low, heavy, and wide. The walls lean slightly backward as they rise. That slope was deliberate. Angled stone deflects cannon fire better than a flat vertical face. Everything you see here was designed for one purpose — to survive bombardment and to make any attacker pay dearly for every step.

The fortress sits on a hill called San Lázaro. From up here, the reason becomes clear. The hill looks over the land approaches to the old walled city. Whoever held this high ground could fire down on Cartagena itself. So the Spanish crown decided that no enemy would ever hold it. They built a fort, and then, over many decades, they made it larger and stronger.

Why did Spain care so much? Cartagena was one of the most important ports in its empire. Silver, gold, and goods from across South America passed through this harbour on their way to Spain. That wealth attracted pirates, privateers, and rival navies. The city was attacked and sacked more than once in its early history. Each raid taught a painful lesson. Walls alone were not enough. The surrounding hills had to be fortified too.

The fort takes its name from King Philip of Spain — Felipe in Spanish. The first, smaller fortification here dates to the seventeenth century. In the eighteenth century, military engineers greatly expanded it. The most famous of them was Antonio de Arévalo, who shaped much of what you see today. He added new batteries, deeper defences, and the tangle of passages beneath your feet. The result is often described as the strongest fortress Spain built in the Americas.

Now for the moment that made this hill famous. In 1741, a huge British fleet arrived under Admiral Edward Vernon. It was one of the largest naval forces of its age, with many ships and thousands of soldiers. The British expected a quick victory. They pushed through the harbour defences and landed troops. Their goal was this hill. If they took San Felipe, the city would fall.

The man who stood in their way was Blas de Lezo, a Spanish naval commander. By then he had already lost a leg, the sight of one eye, and the use of one arm in earlier battles. His men are said to have called him half a man — though he fought like several. Together with the city's defenders, he organised a stubborn resistance. Disease spread through the British camps in the tropical heat. The attack on the fortress failed.

Here is a detail most visitors never hear. Admiral Vernon was so sure of success that medals were struck in Britain to celebrate the capture of Cartagena. Some of these medals even show Blas de Lezo kneeling in surrender. That surrender never happened. The British withdrew, and the medals became a strange souvenir of overconfidence. A few survive in collections today, quiet proof that history does not always follow the plan.

As you walk, look for the entrances to the tunnels. They run through the body of the hill, narrow and dim, with a cool, damp smell after the bright heat outside. The passages allowed soldiers to move unseen, carry supplies, and reach different parts of the defences. Guides often say the tunnels were built so that sound carries far — so defenders could hear an enemy approaching. Step inside and listen to your own footsteps echo off the stone.

Some tunnels are open to visitors, and others are closed or too low to enter comfortably. Inside, the ceilings can feel close, and the floors may be uneven. Take your time. Let your eyes adjust to the dark. If narrow spaces make you uneasy, you can still enjoy the fort from its open terraces and ramps. There is plenty to see in the daylight above.

Keep climbing toward the top. The ramps zigzag upward, and each turn opens a wider view. Below you lies Cartagena — the walled old city with its domes and bell towers, the colourful streets of Getsemaní, and beyond them, the modern towers of Bocagrande along the sea. On a clear day, the water shines silver and blue. From here you can understand the whole defensive system at a glance — city, walls, harbour, and this hill holding them together.

At the foot of the hill, near the entrance, stands a statue of Blas de Lezo. Look closely and you will see how the sculptor shows his injuries — the missing leg, the damaged arm. He is not shown as a perfect hero but as a wounded one. Today the fortress forms part of the historic port and fortifications of Cartagena, recognised by UNESCO as a World Heritage Site. It is no longer a place of war, but a place of memory.

Before you leave, pause on one of the upper walls. Feel the stone again, warm under your hand. Listen to the wind and the city below — car horns, voices, music drifting up from somewhere. Soldiers once stood exactly here, watching the horizon for sails. Now you are watching the same horizon. As you walk back down the ramps, notice how the walls seem to close around you again, quiet and solid, still holding the hill.