The nucleus of the city is built on a ridge of rock (Mount Sceberras) which runs like a tongue into the middle of a bay, which it thus divides into two harbours, the Grand Harbour to the east and the Marsamuschetto to the west, which are subdivided again by three other peninsulas into creeks.
Pietro, forms a more or less protected basin, upon the shores of which are several small harbours (the most important being Carloforte), which are centres of the export of minerals and of the tunny fishery.
ASTROPALIA (classical Astypalaea), an island, with good harbours, in the south part of the Aegean, situated in 36.5° N.
The harbour of Vancouver is one of the finest natural harbours in the world.
The department covers the eastern end of the island and includes all the islands off its coast, among which are Culebra and Vieques; the former (pop. in 18 99, 704) has two excellent harbours and is used as a U.S. naval station; the latter is 21 m.