Whether it's the colourful diversity of flora and fauna, bird species, the some 58 protected areas and National Parks or the river of five colours, Caño Cristales, Colombia is a real treasure trove. Each city is as colourful as the next, especially the old neighbourhoods: Cartagena with its sun-blushed colonial buildings, Medellín surrounded by beautiful mountains, and Bogotá, the highest altitude city offering a blend of historic attractions, street art and modern-day spectacles. The biodiversity of this jewel in South America is what makes the sights to be seen so eclectic and endless.