The southeastern chain of the Carpathians divides where Mármaros County, Transylvania, and Bukovina converge into an angle, forming several main lines which enclose the territory of Transylvania in an almost quadrangular shape and give it the character of a high plateau. The name of this group is the Southeastern Carpathians. Parts of it are the Transylvanian northern and eastern border ranges; the Hargita range, with the remarkable Mount Büdös, containing several caves from which issue strong gases, and the beautiful lake of St. Anna at a height of 950 metres; the southern border range, the largest and most massive portion of the Carpathian mountains; the mountain group of the Banate and the mineral mountain range of the Banate, the latter owing its name to the gold, silver, and other ores as well as the coal abounding in it. This group projects as far as the basin of the Danube and forms there the passes known as the Iron Gate, which greatly impede navigation. To the Transylvanian Hungarian range, extending north from the Maros river, belong the mineral mountains of Transylvania, rich in gold and other ore, and the mountain called Királyhágó, which marks the frontier between Hungary and the independent Transylvania of old. Thirty-eight passes lead from this mountain-system of gigantic dimensions, partly into the countries adjacent to Hungary, partly into the regions divided by them. Of these the most important are: the Jablunka pass, communicating with Silesia and the valley of the Vistula; the Vereczke pass between Munkács and Stry, supposed to be the pass through which the Hungarians entered their present country; the Radna pass, leading into Bukovina; the Ojtóz pass, communicating with Moldavia; the Tömös pass, leading to Bucharest; and the Red Tower pass, leading into Little Wallachia. Besides the Carpathian mountains Hungary also contains a less considerable portion of the Alps, belonging to the so-called Noric Alps. They lie in trans-Danubian Hungary, the Pannonia of old. They embrace the Austro-Styrian border-range, between the valleys of the Danube and Drave; the Vértes-Bakony ranges, of which the Bakony forest forms a part; and the group of the Buda mountains, producing the celebrated wines of that name. Croatia and Slavonia, which are parts of the Hungarian realm, are also traversed by mountains belonging to the Alpine system. We perceive from the preceding account that a large portion of the country is mountainous, but over a third part of it is level land, and so fertile that it may compare to the prairies in North America. The great Hungarian plain, the so-called Alföld (Lowland), boasts of the best soil for the production of wheat, and, stretching down from the offshoots of the Central Carpathians to the frontiers of Servia contains upward of 35,000 square miles. [Illustration: BORDERS OF THE DANUBE.]