(francisco arias-isaza) yes, over here. - needless to say, this well protected haven has seen its share of territorial conflicts. (francisco arias-isaza) it was not a chance that the spanish located and decided to build cartagena. they had plenty of food. we had a coraline pristine system, a mangrove system which provided them a lot of food, fish. it was protected but it was an important place for them already. (sophie fouron) cartagena was a treasure chest. (francisco arias-isaza) yes, actually it was a place where the treasure was kept. the spanish built a castle here to keep the gold, and they built fortresses here, to protect the entrance. they closed bocagrande. they built that wall which is 35 meters, about 1.6 kilometers wide. and they even had a chain across the water to close the entrance. (sophie fouron) cartagena is like the alcatraz of south america. - a blossoming economy created the need for a new waterway, to transport goods rapidly and far from the eyes of pirates. determined, carthaginians dug up the canal del dique, a few hundred years before the birth of the panama ca

(francisco arias-isaza) we have major challenges.scape is so close to sea level that very little sea level rise will bring huge, huge problems to the city. - coveted since the dawn of time for its convenient location, it is now undergoing major changes. initially built within these walls, it is now expanding at an incredible pace. but the growth is pushing carthaginians away

(francisco arias-isaza) we have major challenges. the landscape is so close to sea level that very little sea level rise will bring huge, huge problems to the city. - coveted since the dawn of time for its convenient location, it is now undergoing major changes. initially built within these walls, it is now expanding at an incredible pace. but the growth is pushing carthaginianswa