Note 1: landlocked; strategic location at the crossroads of central Europe with many easily traversable Alpine passes and valleys; major river is the Danube; population is concentrated on eastern lowlands because of steep slopes, poor soils, and low temperatures elsewhere
Note 2: the world's largest and longest ice cave system at 42 km (26 mi) is the Eisriesenwelt (Ice Giants World) inside the Hochkogel mountain near Werfen, about 40 km south of Salzburg; ice caves are bedrock caves that contain year-round ice formations; they differ from glacial caves, which are transient and are formed by melting ice and flowing water within and under glaciers
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