Today is Cartagena, and there’s a good chance I'm not going to get off the boat. Not because there's anything wrong. Because I want to write. Cartagena has a natural harbor, with a narrow entrance and a channel that makes several turns. Here’s a Google map of the entrance to the harbor. If I were working at a more responsive network I’d try to overlay this with an image of our ship so you can be amazed by the ship’s ability to navigate through the passage. For now you'll have to use a little imagination. But not too much.