The old walled town of Cartagena must qualify as one of the finest colonial towns in the world. Colourful mansions with giant wooden balconies, a plaza around every other corner, and a wide protective wall all the way around, from where you can overview the leafy courtyards and rooftops. But the centro's polished facades with all the tourist shops and a suffocating amount of street vendors will eventually push you into other neighbourhoods like San Diego and Getsemani. But only for the better, because here you get the real deal. Local homes, scrappy buildings, old people in rocking chairs and colourful characters in the streets (some dodgy, yeah even scary). In the evening, do as the locals, pick a plaza, buy a beer from the corner shop, and watch life go by.