Cartagena's Submarine.

The first of it's type in the world they would say. Small but interesting like Catriona Too. I would not like to have been inside for long as it is really remarkably small. My Spanish is sufficiently weak not to understand how many men it actually holds, however I am not convinced that information was available. Perhaps my Spanish translation is better than I thought! Nevertheless a very pleasant stroll along the Cartagena front.