The narrow neck that divides the Corinthian from the Saronic Gulf and connects Attica and Bœotia with the Peloponnesus, lifts up among its rugged hills in Megara the picturesque twin peaks of the Kerata. South of the isthmus itself, with its narrow plain and the deep cutting necessary for the canal, rises the splendid acropolis of Acrocorinth, keeping guard at the entrance to the “Island of Pelops.” The Peloponnesus, or Morea, is a rugged complex of mountains that by turns shut out and admit the sea. Of its four irregular peninsulas, jutting out southward in the Argolis and in Laconia and Messenia, each has its mountain system; the more broken hills in the Argolid plain; the ridge of Parnon to the east of the plain of Lacedæmon; the imposing barrier of Taygetus between Sparta and Messenia. In Messenia itself are fertile plains. One is in the midland, as the name Messenia originally implied, among offshoots of the Arcadian Lycæus; while the great mountain fortress of Ithome, 2600 feet high, where crops could be reared and an army supported, towering above the hills and plains of central Messenia, looks down on another larger plain, almost tropical in its products, that stretches southward to the gulf. The centre and west of the Peloponnesus is a mass of peaks and mountain ridges tangled up at abrupt angles but bounded on the north by a formidable chain, generally parallel with the Gulf of Corinth and dominated by Erymanthus and Cyllene to the west and east respectively. Around and against this chain great mountains are piled up like petrified billows. In this part of Greece plains few but important are interspersed, as at Megalopolis or Olympia. Along the northwest coast there is the wider sea-margin of “Hollow” Elis, while along the Corinthian Gulf Ægialus, the “coast-land,” seems often little more than a grudging _marina_ subjacent to the foothills of Erymanthus and Cyllene. From north to south, from east to west the Greek landscape lends itself to panoramic views. Lucian in his “Charon” makes Hermes seat himself on one of the twin peaks of Parnassus and Charon upon the other. With eyes anointed with Homeric eye-salve, the Ferryman, on his furlough from the under-world, is able to see not only the Greater Greece outspread around him,—from Asia Minor to Sicily, from the Danube to Crete,—but to look off beyond to the Orient and to Egypt. These wide outlooks are enhanced by the distinctness of the sky-line, everywhere an important factor. “The hard limestone of which the mountains are composed is apt to break away, and thus produces those sharply-cut outlines which stand out so clearly against the transparent sky of Greece.”