Cartagena is a city that is located on the shores of the Caribbean Sea, in the northwestern part of the South American continent. If you are wondering where is Cartagena in Colombia, it is located in the north of the country and is the capital of the Bolívar region. The city has several archipelagos and islands around that are paradises for true rest. Among these are Tierra Bomba Island, Múcura Islan, and Barú Island, among others.