Olkhon (Ольхон, also transliterated as Olchon) is the third-largest lake-bound island in the world. It is 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 is rich in archeological landmarks. Steep mountains line its eastern shore, and at 1,276 m above sea level, Mount Zhima is the tallest point on the island, peaking at 818 m above the water le… (More on Olkhon)