The other day, I did a post on Medellin with a few links to online guides for the aptly-named ‘City of Eternal Spring’. To compliment that post, here is one on Cartagena starting with a nicely-done video guide to the ciudad vieja section of the ‘Walled City’ done by Matt of The Expeditioner (I really recommend his video section on additional cities and regions of Colombia, not to mention the articles “Colombia Calling” part 1 and part 2)
Cartagena Info
One of the best sources of info in English for Cartagena is Cartagena Info. Although the GUI could use a little bit of an update, the content is thorough and wide-ranging.
Eyes On Colombia 