Viewed from the promontory of Perachora—and especially by night—there is a great contrast between the southern shores of the Gulf of Corinth and the northern shore of the Halcyonic gulf. To the south an almost continuous line of habitation is clearly visible—to the north, only the darkness of a coast where the mountains appear to drop directly into the sea. These mountains constitute a considerable barrier, beginning with the greatest of them, Helicon, to the west, set a little inland: next, on the very edge of the sea, Korombili; and then, further over to the east, the outliers of Cithaeron, which leave only the notoriously difficult route round the coast to Aegosthena by which a Spartan army precariously escaped. It is not surprising that the cities of the Boeotian hinterland largely turned their backs on the sea: except for certain events, to be considered below, this coast played little part in Boeotian history.
There are three significant harbours, or usable beaches, along this Boeotian coast (Fig. 1a). To the east, at the end of the bay between Cithaeron and Korombili is the beach of Livadhostro, the ancient Creusis. It is not a good beach, being open and exposed to the wind. Communication with the hinterland is not easy, and there is no modern road. The Thebans, in the year of Leuctra, kept a small fleet there, perhaps through compulsion rather than choice. At the extreme western end of this section of coast is the harbour of Sarandi. Between these two harbours, and to the west of Korombili, is the great landlocked bay of Domvraina. Even within this bay much of the coast is mountainous and abrupt, but there are two small harbours at the western end, and a reasonably large, very well-sheltered beach and harbour at the eastern end.