Olkhon (Ольхон, also transliterated as Olchon)'s the fourth-largest lake-bound island in the world. It's by far the largest island in Lake Baikal in eastern Siberia, with an area of 730 km² (280 sq. miles). Geography Olkhon has a dramatic combination of terrain and's rich in archeological landmarks. Steep mountains line its eastern shore, and at 1,276 m above sea level, Mount Zhima's the tallest point on the island, peaking at 818 m above the water level… (More on Olkhon)