It consists of a rocky promontory, containing three natural harbours, a large one on the north-west which is still one of the chief commercial harbours of the Levant, and two smaller ones on the east, which were used chiefly for naval purposes.
A vast sum of money and the labour of thousands of men were employed to clear harbours for them, at and near Boulogne.
Shore running westward Guantanamo, Santiago and Cienfuegos, are harbours of the first class, several of them among the best of the world.
The peculiar pouch-shape of almost all the harbours named (Matanzas being a marked exception) greatly increases their security and defensibility.
These pouch harbours are probably " drowned " drainage basins.