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The peaceful cobbled streets of Colonia are just over the Río de la Plata from Buenos Aires, but they seem a world away. Charm might be an overused descriptor, but Colonia, with its old-world architecture, serenity, and water lapping at sandy shores is a place that redefines it.The best activity in Colonia is walking through its peaceful Barrio Histórico (Old Town), a UNESCO
World Heritage Site. Porteños come to Colonia for romantic getaways or for a break from the city. If you like to keep busy on your travels, a late-morning arrival and early-evening departure give you plenty of time to see the sights and wander at will. To really see the city at its own pace, spend the night in one of its many colonial-style bed-and-breakfasts: This offsets travel costs and time and makes a visit here far more rewarding.