The plateau of the Abruzzos, enclosed by these parallel ranges, may be looked upon as the natural citadel of Central Italy. On its western side rise the double pyramids of Monte Velino (8,157 feet); in the north Monte Vettore (8,131 feet) forms the termination of the range of the Sibillini; in the east rises the culminating point of the Apennines, a mountain covered with snow the greater part of the year, and appropriately called the “Great Rock of Italy”—“Gran Sasso d’Italia” (9,518 feet). The fact that this magnificent mountain is the highest in all Italy has been known from times immemorial. The Romans conceived they had discovered the “umbilic of Italy” in a small lake near it, upon which floated an island formed of rank vegetation. The Marsi and their allies, when they took up arms against their Roman oppressors, chose Corfinium, in its neighbourhood, for the seat of their empire, and surnamed it Italica; and there, too, the first movements which led to the resurrection of modern Italy took place. The Gran Sasso, as seen from the Adriatic, affords a magnificent spectacle. Its calcareous masses cannot boast of much beauty of profile, but this is compensated for by the fine Alpine region extending beneath its summit, which remains the haunt of bears and chamois, and where rare plants in the meadows remind us of Switzerland. Forests of beeches and pines are still met with in a few places, and are all the more appreciated as forests no longer exist in the lowland regions. This universal destruction of the forests is one of the great misfortunes of Italy. In many parts of the Roman Apennines even the soil has been washed away, and only in a few crevasses do we meet with brooms and briers.

The valleys on the western slope of the Apennines are enclosed between calcareous spurs of the main range, some of which attain a considerable elevation. The Tiber itself thus passes between two lofty mountains, rising at the lower extremity of two of these Sub-Apennine spurs, and forming a kind of triumphal gateway. These are the Soracte (2,270 feet) and Gennaro (4,162 feet). These fine mountains, with the Sabine Hills and the volcanic groups near them, form the horizon of the Roman Campagna, and their natural beauties are enhanced by the memories of art and history which attach to them.

PEASANTS OF THE ABRUZZOS.

Several ranges of hills and detached mountain groups of calcareous formation, {259} like the Sub-Apennines, border upon the shore of the Tyrrhenian Sea and the marshes which extend along it. Such are the hills, rich in alum, which are grouped around the ancient trachytic cone of the Tolfa. Such, too, are the Monte Lepini (4,845 feet), the naked crest of which has been likened to an ass’s back—schiena d’asino—and which bound the Pontine Marshes on the east. In some of the recesses of these hills there still exist forests of chestnut-trees and beeches, where the descendants of the ancient Volsci may pasture their hogs; but almost everywhere else the hill-sides are bare of vegetation, and the scorching rays of the sun have split the rocks into innumerable angular fragments. To the east of the marshes rises a summit with ten pinnacles, covered with dense shrub on the land side, but barren towards the sea, a few stunted palms excepted, which grow in the fissures of the rock. This isolated hill, a counterpart of the Argentaro of Tuscany, is the Circello (1,729 feet), famous as the residence of the enchantress Circe. The grotto where she changed human beings into animals is still pointed out there to the curious, and the remains of cyclopean walls recall the mythical age of the Odyssey. The ancient Greeks, who were but imperfectly acquainted with Italy, looked upon this dreaded promontory of Circe as one of the most important islands of the Western Cyclades.

During the glacial period the sea, in which have been deposited the chalk and other rocks composing the Sub-Apennines, was the scene of volcanic action on a grand scale. The matter ejected was heaped up in a line of volcanic cones, running in a direction nearly parallel with the Apennines and the coast of the Me­di­ter­ra­nean. These cones are joined to each other by thick layers of tufa, which cover the whole of the plain as far as the foot of the calcareous mountains, and extend for a distance of nearly 120 miles, from Monte Amiata, in Tuscany, to the mountains of Albano, being interrupted only by the alluvial valley of the Tiber. Ponzi and other geologists are of opinion that this tufa was ejected from submarine volcanoes, carried away by the currents, and equally distributed over the depressions of the sea-bottom. No fossils have been discovered in it hitherto, which is accounted for by the presence of icebergs, which prevented a development of animal life.

This volcanic region is remarkable on account of its numerous lakes. The largest of these, that of Bolsena, was formerly looked upon as an ancient crater. This crater would have exceeded by far the largest volcanic vents met with in the Andes or in Java, for it has a circumference of twenty-five miles, and covers an area of forty-four square miles. Modern geologists, however, look upon this crateriform lake as a basin of erosion, and though it occupies the centre of a plateau formed of ashes, scoriæ, and lava, these do not form a steep edge towards the lake, as in the case of veritable craters in the same district. One of the most remarkable of these latter is that of Latera, to the west of the lake, in the centre of which rises a cone of eruption, the Monte Spignano, which has a diameter of nearly five miles.

The district of the Bolsena is likewise remarkable on account of its vertical precipices of tufa and lava. Its picturesque towns and villages are perched upon {260} bold promontories looking down on the valleys. The old town of Bagnorea occupies the extremity of an immense mole, and is joined to the new town by a giddy path, bounded by steep precipices, which timid travellers do not care to venture upon. Orvieto stands on an isolated rock resembling a fortress. Pittigliano is surrounded by precipices: by cutting away a few yards of the narrow isthmus which joins it to the rest of the plateau, access to it would be impossible to all but birds. In the Middle Ages, when nobles and towns were continually at war, the capture of one of these eyries was looked upon as a grand achievement.

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Fig. 90.—THE LAKE OF BOLSENA.