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The mountain ranges surrounding Liberec, known as the Jizera Mountains and the Lusatian Mountains, form a natural border between the Czech Republic and Poland. These mountains offer breathtaking landscapes, hiking trails, and opportunities for skiing and other outdoor activities. The highest peak in the Jizera Mountains is Smrk at 1,124 meters, while the highest point in the Lusatian Mountains is Luž with an elevation of 793 meters.