Lake Baikal, located in Russia, is the world's deepest and oldest freshwater lake, renowned for its crystal-clear waters and unique biodiversity, including the Baikal seal. Accessibility can be challenging, especially in remote areas, and may require specialized transportation. While solo travel is possible, guided tours are recommended for deeper exploration and safety, particularly during winter when the lake freezes. The peak season is summer (June-August) for hiking and boat trips, while winter (December-March) offers ice skating and dog sledding but requires warm clothing and awareness of ice conditions. Costs vary depending on the type of tour and accommodation, but expect to spend a moderate amount. A typical visit lasts from a few days to a week to experience the diverse landscapes and activities. Consider seasonal accessibility to specific attractions such as Olkhon Island as weather impacts transportation.