Grzegorz Gawlik on different continents and in different climates. Among other things, he discovered the highest lakes in the world on the Ojos del Salado volcano and found that the highest active volcano in the world is Llullaillaco. In addition, he explored more than 100 other volcanic sites such as geyser fields, geothermal fields, volcanic caves, volcanic deserts, volcanic plateaus, volcanic craters and cones, volcanic rock formations, lava fields. He climbed to about 100 peaks 4-, 5-, 6- and 7-thousand meters in the Himalayas, Andes, Pamir, Caucasus, Cordillera, High Atlas, Tanzania, Borneo and hundreds of lower peaks. During the expeditions, Gawlik explored
Świętokrzyskie Mountains Świętokrzyskie Mountains The Świętokrzyskie Mountains (, , "Holy Cross Mountains") are a mountain range in central Poland, near the city of Kielce. The Świętokrzyskie Mountains are some of the oldest mountains in Europe, and the highest between the Sudetes and the Ural Mountains. The mountain range comprises several lesser ranges, the highest of which is Łysogóry (literally "Bald Mountains"). The two highest peaks are Łysica, 612 m (2008 ft), and Łysa Góra, 593 m (1946 ft). Together with the Jura Krakowsko-Częstochowska, the mountains form a region called the Lesser-Poland Upland ("Wyżyna Małopolska"). They cover an area of 1684 km² (650