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The northwest is composed of two large regions: The Choco department, a large expanse of tropical forest sparsely populated that includes the beautiful National Park Katie, and the departments of Antioquia, Caldas, Risaralda and Quindio, a mountainous region, predominantly white, where is located the dynamic, industrial and commercial city of Medellin.
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The oldest town in the northwest, is Santa Fe de Antioquia, about 80 km northwest of Medellin, which still retains much of its colonial architecture and environment.