Height 1324 m (the high­est point of the island). A vol­canic cone (with a base diam­e­ter of 3.5–4 km) ris­es in the form of an island inside Lake Kolt­sevoye lying at an alti­tude of 400 m (diam­e­ter about 7 km). The lake is sur­round­ed by a som­ma — the walls of the more ancient Tao-Rusyr caldera (heights 540–920 m with a base diam­e­ter of 16–17 km). The caldera is com­posed of basaltic lavas and andesitic loose mate­r­i­al, the vol­canic cone is com­posed of andesites. The slopes are cov­ered with dwarf cedar. There is only one known his­tor­i­cal erup­tion, in 1952. Cur­rent­ly, fumarolic and ther­mal activ­i­ty is being record­ed. Named in 1805 by I. F. Kruzen­shtern after the nav­i­ga­tor Pyotr Kuzmich Kren­it­syn.